Initialize COM prior to displaying the file dialog.

dlls/commdlg/Makefile.in

@@ -5,6 +5,7 @@ VPATH     = @srcdir@
 MODULE    = comdlg32.dll
 IMPORTLIB = libcomdlg32.$(IMPLIBEXT)
 IMPORTS   = shell32 shlwapi comctl32 winspool user32 gdi32 advapi32 kernel32 ntdll
+DELAYIMPORTS = ole32
 EXTRALIBS = -luuid
 
 C_SRCS = \

dlls/commdlg/filedlg.c

@@ -250,6 +250,7 @@ static BOOL WINAPI GetFileName95(FileOpenDlgInfos *fodInfos)
     LPCVOID template;
     HRSRC hRes;
     HANDLE hDlgTmpl = 0;
+    HRESULT hr;
 
     /* test for missing functionality */
     if (fodInfos->ofnInfos->Flags & UNIMPLEMENTED_FLAGS)
@@ -281,11 +282,16 @@ static BOOL WINAPI GetFileName95(FileOpenDlgInfos *fodInfos)
       fodInfos->HookMsg.sharevistring = RegisterWindowMessageA(SHAREVISTRINGA);
     }
 
+    /* Some shell namespace extensions depend on COM being initialized. */
+    hr = CoInitialize(NULL);
+
     lRes = DialogBoxIndirectParamA(COMDLG32_hInstance,
                                   (LPDLGTEMPLATEA) template,
                                   fodInfos->ofnInfos->hwndOwner,
                                   FileOpenDlgProc95,
                                   (LPARAM) fodInfos);
+    if (SUCCEEDED(hr)) 
+        CoUninitialize();
 
     /* Unable to create the dialog */
     if( lRes == -1)