PRB: SHBrowseForFolder() Fails When Entering an Invalid Folder Name (224342)

MORE INFORMATION

Steps to Reproduce Behavior

The following Win32 application demonstrates how to use the BrowseCallbackProc() function to validate a folder name that is typed into the optional edit box in a Browse Folder dialog box.

To demonstrate the problem that occurs when an invalid folder name is entered, remove the comment characters from the #define SHOW_PROBLEM line:

#include <windows.h>
#include <shlobj.h>

int CALLBACK BrowseCallbackProc(HWND hwnd, UINT uMsg, 
                                 LPARAM lParam, LPARAM lpData);

// To demonstrate the problem, remove the comment characters from the
// following line:
//#define SHOW_PROBLEM

int WINAPI WinMain( HINSTANCE hInst, HINSTANCE hPrevInst, 
                     LPSTR lpszCmdLine, int nCmdShow)
{
   BROWSEINFO bi;
   ZeroMemory(&bi, sizeof(bi));

   TCHAR szDisplayName[MAX_PATH];
   szDisplayName[0] = '\0';

   bi.hwndOwner = NULL;
   bi.pidlRoot = NULL;
   bi.pszDisplayName = szDisplayName;
   bi.lpszTitle = TEXT("Browsing");
   bi.ulFlags = BIF_EDITBOX | BIF_VALIDATE ;
#ifndef SHOW_PROBLEM
   bi.lpfn = BrowseCallbackProc;
#endif
   bi.lParam = NULL;
   bi.iImage = 0;

   LPITEMIDLIST pidl = SHBrowseForFolder(&bi);

   if (NULL != pidl)
      MessageBox(NULL, szDisplayName, TEXT("SHBrowseFolder"), MB_OK);
   else
      MessageBox(NULL, TEXT("SHBrowseFolder failed"), TEXT("SHBrowseFolder"), MB_OK);

   return 0;
}


#define DONT_DISMISS 1

int CALLBACK BrowseCallbackProc(HWND hwnd, UINT uMsg, 
                                 LPARAM lParam, LPARAM lpData)
{
   switch (uMsg)
   {
   case BFFM_VALIDATEFAILED:
      return DONT_DISMISS;
   default:
      return 0;
   }
}