CXTPBufferDC m_hDC is NULL

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic


   I find rencently ,my xtp baed app ofen occure fail , and I find the pointer of CXTPBufferDC ofen has a Nullo m_hDc, for example,

void CXTPCommandBar::OnPaint()
{
 CPaintDC paintDC(this); 
 CXTPBufferDC dc(paintDC, CXTPClientRect(this));

 //========= now if(dc.m_hDC==NULL) will return TRUE============
  DrawCommandBar(&dc);
}

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
blueseaing Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 14 June 2004 Status: Offline Points: 42	Post Options Post Reply Quote blueseaing Report Post Thanks(0) Quote Reply Topic: CXTPBufferDC m_hDC is NULL Posted: 21 November 2004 at 9:10pm
	I find rencently ,my xtp baed app ofen occure fail , and I find the pointer of CXTPBufferDC ofen has a Nullo m_hDc, for example, void CXTPCommandBar::OnPaint() { CPaintDC paintDC(this); CXTPBufferDC dc(paintDC, CXTPClientRect(this)); //========= now if(dc.m_hDC==NULL) will return TRUE============ DrawCommandBar(&dc); }