Codejock Developer Community : Problem with TrackPopupMenu/TPM_LEFTALIGN http://forum.codejock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Tue, 12 May 2026 17:05:21 +0000 Mon, 21 Dec 2020 17:51:37 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 forum.codejock.com/RSS_post_feed.asp?TID=24117 <![CDATA[Codejock Developer Community]]> http://forum.codejock.com/forum_images/codejock-logo.gif http://forum.codejock.com/ <![CDATA[Problem with TrackPopupMenu/TPM_LEFTALIGN : I recently upgraded a legacy vb6...]]> http://forum.codejock.com/forum_posts.asp?TID=24117&PID=78007&title=problem-with-trackpopupmenu-tpm-leftalign#78007 Author: rdefulio
Subject: 24117
Posted: 21 December 2020 at 5:51pm

I recently upgraded a legacy vb6 project from SkinFramework ActiveX Control 16.3.1 to 19.3.0 and Popup menu alignments started failing.  I am using the Windows TrackPopupMenu API to build a pop up menu and display it in the appropriate location in the application.

See the following simplified example.

Flags = TPM_RIGHTBUTTON + TPM_NONOTIFY + TPM_RETURNCMD
    
iMenu = TrackPopupMenu(hMenu, Flags + TPM_LEFTALIGN, p.x, p.y, 0, GetForegroundWindow(), 0)

iMenu = TrackPopupMenu(hMenu, Flags + TPM_CENTERALIGN, p.x, p.y, 0, GetForegroundWindow(), 0)

iMenu = TrackPopupMenu(hMenu, Flags + TPM_RIGHTALIGN, p.x, p.y, 0, GetForegroundWindow(), 0)

In this example, LEFTALIGN ignores the value in p.x and treats it as zero, basically putting it at the left-most position on the display.  The Center and Right align work properly.

I reproduced this in the SkinControls sample application.  Rolling back to 16.3.1 fixes the issue.  I reproduced the issue in version 17.3, 18.4, and 19.3.  I need to upgrade because of an apparrent bug in 16.3 that affects scroll bars on server 2016 that the newer versions fix.

Here's what happens with TPM_LEFTALIGN  (Incorrect behavior)



And here's what happens with TPM_CENTERALIGN (This is the correct behavior)



Note that changing the application from LEFT to CENTER is not a desirable workaround because it changes where the popup appears relative to the mouse cursor (left, center or right aligned based on the mouse cursor's location).

Can I get a fix expedited for this?

Thanks

Ron

[Edited to fix images]

]]> Mon, 21 Dec 2020 17:51:37 +0000 http://forum.codejock.com/forum_posts.asp?TID=24117&PID=78007&title=problem-with-trackpopupmenu-tpm-leftalign#78007