INFO: OFN_EXPLORER from 32-bit Thunk Brings Up Old CommDlg

ID: Q140726

The information in this article applies to:

Microsoft Windows 98
Microsoft Windows 95

SUMMARY

You can have a 16-bit application running under Windows 95 take advantage of the new Explorer-style FileOpen common dialog by thunking up to a 32-bit DLL, specifying the OFN_EXPLORER style from that DLL, and linking it with the new COMDLG32.DLL. This, however, causes the old-style dialog to come up, instead of the new Explorer-style dialog.

MORE INFORMATION

Although the common dialog function is called from the 32-bit DLL, COMDLG32.DLL detects that the current process is still a 16-bit application and quickly reverts back to the old-style File Open common dialog. This is because the new Explorer-style dialog uses multiple threads, which 16-bit applications do not support.

The only way for a 16-bit application to take advantage of the new Explorer- style functionality is to port to Win32 and make the call to GetOpenFileName() directly.


Keywords          : kbCmnDlg kbCmnDlgFileO kbCmnDlgSave kbGrpUser kbWinOS95 kbWinOS98 
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Platform          : 
Issue type        : kbinfo

Last Reviewed: March 7, 1999