I think you have not deleted layout. 

call

delete m_pLayout  in destructor if so.

I get the following memory leaks when I exit a debug build of my app with XTP v9.51.  What info can I provide that would give a clue as to what is causing the leaks?

Detected memory leaks! Dumping objects -> plex.cpp(31) : {63956} normal block at 0x0105A0F0, 244 bytes long.  Data: <         &n bsp;      > 00 00 00 00 0C A1 05 01 00 00 00 00 90 F5 02 01 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneManager.cpp(264) : {63955} client block at 0x0105A028, subtype 0, 140 bytes long. a CCmdTarget object at $0105A028, 140 bytes long H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneManager.cpp(264) : {63954} client block at 0x01025910, subtype 0, 140 bytes long. a CCmdTarget object at $01025910, 140 bytes long plex.cpp(31) : {63953} normal block at 0x01025858, 124 bytes long.  Data: <         &n bsp;   Z  > 00 00 00 00 00 00 00 00 00 00 00 00 00 5A 00 01 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneSplitterContainer.cpp(32 7) : {63952} client block at 0x01005A00, subtype 0, 72 bytes long. a CWnd object at $01005A00, 72 bytes long H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneManager.cpp(264) : {63951} client block at 0x01005938, subtype 0, 140 bytes long. a CCmdTarget object at $01005938, 140 bytes long H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneManager.cpp(264) : {63950} client block at 0x0102F658, subtype 0, 140 bytes long. a CCmdTarget object at $0102F658, 140 bytes long plex.cpp(31) : {63949} normal block at 0x01052C30, 124 bytes long.  Data: <    @,          > 00 00 00 00 40 2C 05 01 00 00 00 00 90 F5 02 01 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneManager.cpp(264) : {63948} client block at 0x0102F590, subtype 0, 140 bytes long. a CCmdTarget object at $0102F590, 140 bytes long H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneTabbedContainer.cpp(138) : {63947} client block at 0x01052BB8, subtype 0, 52 bytes long. a CCmdTarget object at $01052BB8, 52 bytes long afxtempl.h(370) : {63946} normal block at 0x01052B60, 20 bytes long.  Data: <    p           ; > 08 9F 02 01 70 9F 02 01 CD CD CD CD CD CD CD CD H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneTabbedContainer.cpp(136) : {63945} normal block at 0x01029F70, 40 bytes long.  Data: < m           ;    > 9C 6D 93 00 00 00 00 00 00 00 00 00 00 00 00 00 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneTabbedContainer.cpp(135) : {63943} normal block at 0x01029F08, 40 bytes long.  Data: < m           ;    > 9C 6D 93 00 00 00 00 00 00 00 00 00 00 00 00 00 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\TabManager\XTPTabManager.cpp(474) : {63942} normal block at 0x01029E90, 52 bytes long.  Data: <         &n bsp;      > 14 AE 93 00 02 00 00 00 00 00 00 00 0E 00 00 00 afxtempl.h(370) : {63941} normal block at 0x00F26918, 20 bytes long.  Data: <X\               > 58 5C 00 01 98 9F 01 01 90 9E 02 01 CD CD CD CD H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\TabManager\XTPTabManager.cpp(473) : {63940} normal block at 0x01019F98, 52 bytes long.  Data: <         &n bsp;      > 08 AE 93 00 01 00 00 00 01 00 00 00 0E 00 00 00 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\TabManager\XTPTabManager.cpp(472) : {63938} normal block at 0x01005C58, 52 bytes long.  Data: <         &n bsp;      > F0 AD 93 00 00 00 00 00 01 00 00 00 0E 00 00 00 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneManager.cpp(266) : {63937} client block at 0x00F25B70, subtype 0, 344 bytes long. a CXTPDockingPaneTabbedContainer object at $00F25B70, 344 bytes long H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneBase.cpp(158) : {63936} normal block at 0x010057D0, 72 bytes long.  Data: <,r               > 2C 72 93 00 00 00 00 00 00 00 00 00 B0 02 00 01 plex.cpp(31) : {63935} normal block at 0x01005718, 124 bytes long.  Data: <    (W      X   > 00 00 00 00 28 57 00 01 00 00 00 00 58 9D 02 01 plex.cpp(31) : {63934} normal block at 0x00F26860, 124 bytes long.  Data: <         &n bsp;  l[  > 00 00 00 00 00 00 00 00 00 00 00 00 6C 5B 02 01 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneTabbedContainer.cpp(138) : {63931} client block at 0x01019F20, subtype 0, 52 bytes long. a CCmdTarget object at $01019F20, 52 bytes long afxtempl.h(370) : {63930} normal block at 0x01055B20, 20 bytes long.  Data: < F   G          > A8 46 05 01 10 47 05 01 CD CD CD CD CD CD CD CD H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneTabbedContainer.cpp(136) : {63929} normal block at 0x01054710, 40 bytes long.  Data: < m           ;    > 9C 6D 93 00 00 00 00 00 00 00 00 00 00 00 00 00 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneTabbedContainer.cpp(135) : {63927} normal block at 0x010546A8, 40 bytes long.  Data: < m           ;    > 9C 6D 93 00 00 00 00 00 00 00 00 00 00 00 00 00 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\TabManager\XTPTabManager.cpp(474) : {63926} normal block at 0x01055AA8, 52 bytes long.  Data: <         &n bsp;      > 14 AE 93 00 02 00 00 00 00 00 00 00 0E 00 00 00 afxtempl.h(370) : {63925} normal block at 0x00F2C0C0, 20 bytes long.  Data: <    pX   Z      > 98 FA F2 00 70 58 F2 00 A8 5A 05 01 CD CD CD CD H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\TabManager\XTPTabManager.cpp(473) : {63924} normal block at 0x00F25870, 52 bytes long.  Data: <         &n bsp;      > 08 AE 93 00 01 00 00 00 01 00 00 00 0E 00 00 00 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\TabManager\XTPTabManager.cpp(472) : {63922} normal block at 0x00F2FA98, 52 bytes long.  Data: <         &n bsp;      > F0 AD 93 00 00 00 00 00 01 00 00 00 0E 00 00 00 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneManager.cpp(266) : {63921} client block at 0x01025B30, subtype 0, 344 bytes long. a CXTPDockingPaneTabbedContainer object at $01025B30, 344 bytes long H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneManager.cpp(265) : {63920} normal block at 0x01029D58, 136 bytes long.  Data: < v      x       > F8 76 93 00 F4 01 00 00 78 00 00 00 B0 02 00 01 plex.cpp(31) : {63919} normal block at 0x01002E78, 124 bytes long.  Data: <     .       P  > 00 00 00 00 88 2E 00 01 00 00 00 00 C0 50 02 01 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneManager.cpp(265) : {63918} normal block at 0x010250C0, 136 bytes long.  Data: < v           ;    > F8 76 93 00 00 00 00 00 00 00 00 00 B0 02 00 01 strcore.cpp(118) : {63063} normal block at 0x01025EF8, 47 bytes long.  Data: <    "   "   Simu> 01 00 00 00 22 00 00 00 22 00 00 00 53 69 6D 75 strcore.cpp(118) : {1677} normal block at 0x01006130, 23 bytes long.  Data: <         &n bsp;  PTB > 01 00 00 00 0A 00 00 00 0A 00 00 00 50 54 42 20 strcore.cpp(118) : {1676} normal block at 0x01004E50, 23 bytes long.  Data: <         &n bsp;  TDL > 01 00 00 00 0A 00 00 00 0A 00 00 00 54 44 4C 20 strcore.cpp(118) : {1675} normal block at 0x01004DE8, 29 bytes long.  Data: <         &n bsp;  Test> 01 00 00 00 10 00 00 00 10 00 00 00 54 65 73 74 strcore.cpp(118) : {1674} normal block at 0x01004D90, 27 bytes long.  Data: <         &n bsp;  Volt> 01 00 00 00 0E 00 00 00 0E 00 00 00 56 6F 6C 74 strcore.cpp(118) : {1518} normal block at 0x01003560, 29 bytes long.  Data: <         &n bsp;  PTB > 01 00 00 00 0F 00 00 00 10 00 00 00 50 54 42 20 strcore.cpp(118) : {1517} normal block at 0x010034F8, 29 bytes long.  Data: <         &n bsp;  TDL > 01 00 00 00 0F 00 00 00 10 00 00 00 54 44 4C 20 strcore.cpp(118) : {1516} normal block at 0x01003490, 35 bytes long.  Data: <         &n bsp;  Test> 01 00 00 00 15 00 00 00 16 00 00 00 54 65 73 74 strcore.cpp(118) : {1515} normal block at 0x01003428, 33 bytes long.  Data: <         &n bsp;  Volt> 01 00 00 00 13 00 00 00 14 00 00 00 56 6F 6C 74 plex.cpp(31) : {1514} normal block at 0x010032F0, 244 bytes long.  Data: <     3      P)  > 00 00 00 00 0C 33 00 01 00 00 00 00 50 29 00 01 strcore.cpp(118) : {1513} normal block at 0x01003298, 28 bytes long.  Data: <         &n bsp;  Simu> 01 00 00 00 0E 00 00 00 0F 00 00 00 53 69 6D 75 plex.cpp(31) : {1512} normal block at 0x010031E0, 124 bytes long.  Data: <         &n bsp;  X1  > 00 00 00 00 00 00 00 00 00 00 00 00 58 31 00 01 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneSplitterContainer.cpp(32 7) : {1511} client block at 0x01003158, subtype 0, 72 bytes long. a CWnd object at $01003158, 72 bytes long plex.cpp(31) : {1508} normal block at 0x010030A0, 124 bytes long.  Data: <         &n bsp;  P)  > 00 00 00 00 00 00 00 00 00 00 00 00 50 29 00 01 plex.cpp(31) : {1507} normal block at 0x01002FE8, 124 bytes long.  Data: <         &n bsp;  L   > 00 00 00 00 00 00 00 00 00 00 00 00 4C 06 00 01 plex.cpp(31) : {1506} normal block at 0x01002F30, 124 bytes long.  Data: <    @/      H   > 00 00 00 00 40 2F 00 01 00 00 00 00 48 05 00 01 plex.cpp(31) : {1504} normal block at 0x01002DC0, 124 bytes long.  Data: < T      (U   -  > B8 54 F2 00 00 00 00 00 28 55 F2 00 14 2D 00 01 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneManager.cpp(264) : {1503} client block at 0x01002CF8, subtype 0, 140 bytes long. a CCmdTarget object at $01002CF8, 140 bytes long H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneManager.cpp(264) : {1502} client block at 0x01002C30, subtype 0, 140 bytes long. a CCmdTarget object at $01002C30, 140 bytes long H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneManager.cpp(264) : {1501} client block at 0x01002B68, subtype 0, 140 bytes long. a CCmdTarget object at $01002B68, 140 bytes long H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneManager.cpp(264) : {1500} client block at 0x01002AA0, subtype 0, 140 bytes long. a CCmdTarget object at $01002AA0, 140 bytes long H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneManager.cpp(267) : {1499} normal block at 0x01002A18, 72 bytes long.  Data: <,r            ]  > 2C 72 93 00 00 00 00 00 00 00 00 00 B8 5D F2 00 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneManager.cpp(264) : {1498} client block at 0x01002950, subtype 0, 140 bytes long. a CCmdTarget object at $01002950, 140 bytes long H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneTabbedContainer.cpp(138) : {1497} client block at 0x010028D8, subtype 0, 52 bytes long. a CCmdTarget object at $010028D8, 52 bytes long afxtempl.h(370) : {1496} normal block at 0x01002880, 20 bytes long.  Data: < '   (          > B0 27 00 01 18 28 00 01 CD CD CD CD CD CD CD CD H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneTabbedContainer.cpp(136) : {1495} normal block at 0x01002818, 40 bytes long.  Data: < m           ;    > 9C 6D 93 00 00 00 00 00 00 00 00 00 00 00 00 00 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneTabbedContainer.cpp(135) : {1493} normal block at 0x010027B0, 40 bytes long.  Data: < m           ;    > 9C 6D 93 00 00 00 00 00 00 00 00 00 00 00 00 00 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\TabManager\XTPTabManager.cpp(474) : {1492} normal block at 0x01002738, 52 bytes long.  Data: <         &n bsp;      > 14 AE 93 00 02 00 00 00 00 00 00 00 0E 00 00 00 afxtempl.h(370) : {1491} normal block at 0x010026E0, 20 bytes long.  Data: < %  h&  8'      > F0 25 00 01 68 26 00 01 38 27 00 01 CD CD CD CD H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\TabManager\XTPTabManager.cpp(473) : {1490} normal block at 0x01002668, 52 bytes long.  Data: <         &n bsp;      > 08 AE 93 00 01 00 00 00 01 00 00 00 0E 00 00 00 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\TabManager\XTPTabManager.cpp(472) : {1488} normal block at 0x010025F0, 52 bytes long.  Data: <         &n bsp;      > F0 AD 93 00 00 00 00 00 01 00 00 00 0E 00 00 00 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneManager.cpp(266) : {1487} client block at 0x01002458, subtype 0, 344 bytes long. a CXTPDockingPaneTabbedContainer object at $01002458, 344 bytes long H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneTabbedContainer.cpp(138) : {1486} client block at 0x010023E0, subtype 0, 52 bytes long. a CCmdTarget object at $010023E0, 52 bytes long afxtempl.h(370) : {1485} normal block at 0x01002388, 20 bytes long.  Data: < "   #          > B8 22 00 01 20 23 00 01 CD CD CD CD CD CD CD CD H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneTabbedContainer.cpp(136) : {1484} normal block at 0x01002320, 40 bytes long.  Data: < m           ;    > 9C 6D 93 00 00 00 00 00 00 00 00 00 00 00 00 00 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneTabbedContainer.cpp(135) : {1482} normal block at 0x010022B8, 40 bytes long.  Data: < m           ;    > 9C 6D 93 00 00 00 00 00 00 00 00 00 00 00 00 00 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\TabManager\XTPTabManager.cpp(474) : {1481} normal block at 0x01002240, 52 bytes long.  Data: <         &n bsp;      > 14 AE 93 00 02 00 00 00 00 00 00 00 0E 00 00 00 afxtempl.h(370) : {1480} normal block at 0x010021E8, 20 bytes long.  Data: <    h   @"      > F0 0A 00 01 68 0B 00 01 40 22 00 01 CD CD CD CD H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\TabManager\XTPTabManager.cpp(473) : {1479} normal block at 0x01000B68, 52 bytes long.  Data: <         &n bsp;      > 08 AE 93 00 01 00 00 00 01 00 00 00 0E 00 00 00 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\TabManager\XTPTabManager.cpp(472) : {1477} normal block at 0x01000AF0, 52 bytes long.  Data: <         &n bsp;      > F0 AD 93 00 00 00 00 00 01 00 00 00 0E 00 00 00 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneManager.cpp(266) : {1476} client block at 0x01000958, subtype 0, 344 bytes long. a CXTPDockingPaneTabbedContainer object at $01000958, 344 bytes long H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneTabbedContainer.cpp(138) : {1475} client block at 0x010008E0, subtype 0, 52 bytes long. a CCmdTarget object at $010008E0, 52 bytes long afxtempl.h(370) : {1474} normal block at 0x01000888, 20 bytes long.  Data: <         &n bsp;      > 90 F8 F2 00 20 08 00 01 CD CD CD CD CD CD CD CD H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneTabbedContainer.cpp(136) : {1473} normal block at 0x01000820, 40 bytes long.  Data: < m           ;    > 9C 6D 93 00 00 00 00 00 00 00 00 00 00 00 00 00 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneTabbedContainer.cpp(135) : {1471} normal block at 0x00F2F890, 40 bytes long.  Data: < m           ;    > 9C 6D 93 00 00 00 00 00 00 00 00 00 00 00 00 00 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\TabManager\XTPTabManager.cpp(474) : {1470} normal block at 0x010007A8, 52 bytes long.  Data: <         &n bsp;      > 14 AE 93 00 02 00 00 00 00 00 00 00 0E 00 00 00 afxtempl.h(370) : {1469} normal block at 0x00F2FB60, 20 bytes long.  Data: <8    U          > 38 01 00 01 F8 55 F2 00 A8 07 00 01 CD CD CD CD H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\TabManager\XTPTabManager.cpp(473) : {1468} normal block at 0x00F255F8, 52 bytes long.  Data: <         &n bsp;      > 08 AE 93 00 01 00 00 00 01 00 00 00 0E 00 00 00 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\TabManager\XTPTabManager.cpp(472) : {1466} normal block at 0x01000138, 52 bytes long.  Data: <         &n bsp;      > F0 AD 93 00 00 00 00 00 01 00 00 00 0E 00 00 00 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneManager.cpp(266) : {1465} client block at 0x01000610, subtype 0, 344 bytes long. a CXTPDockingPaneTabbedContainer object at $01000610, 344 bytes long H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneManager.cpp(265) : {1464} normal block at 0x01000548, 136 bytes long.  Data: < v      x    ]  > F8 76 93 00 F4 01 00 00 78 00 00 00 B8 5D F2 00 plex.cpp(31) : {1461} normal block at 0x00F254B8, 124 bytes long.  Data: <     T      `^  > 00 00 00 00 C8 54 F2 00 00 00 00 00 60 5E F2 00 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneManager.cpp(265) : {1460} normal block at 0x00F25E60, 136 bytes long.  Data: < v           ; ]  > F8 76 93 00 00 00 00 00 00 00 00 00 B8 5D F2 00 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneManager.cpp(795) : {1452} normal block at 0x00F25DB8, 108 bytes long.  Data: < (  `^   *   *  > 98 28 93 00 60 5E F2 00 18 2A 00 01 04 2A 93 00 H:\Program Files\Codejock Software\MFC\Xtreme Toolkit Pro v9.51\Src\DockingPane\XTPDockingPaneManager.cpp(795) : {1447} normal block at 0x010002B0, 108 bytes long.  Data: < (   P   W   *  > 98 28 93 00 C0 50 02 01 D0 57 00 01 04 2A 93 00 Object dump complete.