DOCERR: Using IDABORT w/ GetOpenFileName & GetSaveFileName

• Microsoft Windows Software Development Kit (SDK) for Windows version 3.1

SYMPTOMS

If an application uses the IDABORT value to end the GetOpenFileName() or GetSaveFileName() dialog boxex provided by the common dialog box library (COMMDLG), the application does not receive the proper value.

RESOLUTION

Set the lCustData member of the OPENFILENAME structure to the desired return value. If lCustData is used to transfer some other data, use a global variable to pass the return value.

MORE INFORMATION

The IDABORT value is documented on page 157 of the "Microsoft Windows Software Development Kit: Programmer's Reference Volume 1: Overview" manual as follows:

   When a hook function posts the IDABORT value, the common dialog box
   function returns the value contained in the low word of the lParam
   parameter. For example, if the hook function for GetOpenFileName
   called the PostMessage function with (LONG) 100 as the last
   parameter, GetOpenFileName would return 100.

Specifying IDOK in the low-order word of lParam causes GetOpenFileName() and GetSaveFileName() to return TRUE. Any other value causes these functions to return FALSE.