BUG: Default Dialog-Based Application Doesn't Work in Win32s

This article was previously published under Q138971
This article has been archived. It is offered "as is" and will no longer be updated.
SYMPTOMS
A dialog-based application generated using AppWizard will not run properlyunder Win32s.
CAUSE
When AppWizard generates a dialog-based application, it uses a DIALOGEXresource for the main dialog. Win32s, however, does not support DIALOGEXresources. As a result, the dialog box looks incorrect on Win32s. Thisproblem is documented in the Vcread.wri file that ships with Visual C++version 4.0 and 4.1.
RESOLUTION
To get your dialog-based application working in Win32s, you must changethe DIALOGEX resource to a DIALOG resource, and remove the WS_EX_APPWINDOWstyle. This can be done as follows:

  1. Open the .rc file as a text file
  2. Search for the DIALOGEX statement and change DIALOGEX to DIALOG.
  3. Remove the line containing the extended style WS_EX_APPWINDOW for this dialog box.
  4. In OnInitDialog() for the main dialog, add the extended style by adding the following line:
       ModifyStyleEx(0, WS_EX_APPWINDOW);							
STATUS
Microsoft has confirmed this to be a bug in the Microsoft products listedat the beginning of this article. We are researching this problem and willpost new information here in the Microsoft Knowledge Base as soon as itbecomes available.

Visual C++ versions 4.2 and later do not support building Win32sapplications.
MORE INFORMATION
The following is from the .rc file for a dialog-based application:
   ...   IDD_DIALOGBASED_DIALOG DIALOGEX  0, 0, 185, 92   STYLE DS_MODALFRAME | WS_POPUP | WS_VISIBLE | WS_CAPTION   | WS_SYSMENU   EXSTYLE WS_EX_APPWINDOW   ...				
After the changes, these lines should look like this:
   ...   IDD_DIALOGBASED_DIALOG DIALOG  0, 0, 185, 92   STYLE DS_MODALFRAME | WS_POPUP | WS_VISIBLE | WS_CAPTION   | WS_SYSMENU   ...				
REFERENCES
Visual C++ version 4.0 Vcread.wri file.
CDialog
Properties

Article ID: 138971 - Last Review: 01/06/2015 01:18:34 - Revision: 2.0

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