Moveable one dialog window

[xwb]

I've got a program that looks like

#include "stdafx.h"
#include "resource.h"
#include "CommentDlg.h"

int APIENTRY WinMain(
   HINSTANCE hInstance,
   HINSTANCE hPrevInstance,
   LPSTR     lpCmdLine,
   int       nCmdShow)
{  
    DialogBox(hInstance, MAKEINTRESOURCE(IDD_COMMENTDLG), 0, (DLGPROC)CommentDlg);
    return 0;
}

CommentDlg is just a switch statement - basically a WinProc. On XP VS2003, it just stays in the top left corner and cannot be moved. On Vista VS2005, I can move it round. I don't have VS2005 on XP.

I'm just wondering: is this an XP problem or a VS2003 problem. If it is a VS2003 problem then I'll have to uninstall VS2003 and find a copy of VS2005 somewhere that I can install.

 

[xwb]

Just copied the VS2005 executable to XP and the VS2003 executable to Vista. Can't move the window round on XP but I can on Vista so I guess it is an XP problem.

Any idea how I can get around this problem short of rewriting the WinMain bit? On XP, it doesn't pick up WM_WINPOSCHANGING with any coordinate other than 0,0. On Vista, I get the value of the top left corner. Do I need to set some special property first?

 

[xwb]

What is even more curious is it doesn't work at all on W2K. Works fine on W95/W98.

 

[xwb]

The W2K thing is a red herring - it was the ICC stuff. It is stills stuck in the top left corner.