diff -r 56cd8111b7f7 -r 41300fa6a67c src/gui/image/qpixmap_win.cpp
--- a/src/gui/image/qpixmap_win.cpp	Tue Jan 26 12:42:25 2010 +0200
+++ b/src/gui/image/qpixmap_win.cpp	Tue Feb 02 00:43:10 2010 +0200
@@ -121,6 +121,9 @@
 
 HBITMAP QPixmap::toWinHBITMAP(HBitmapFormat format) const
 {
+    if (isNull())
+        return 0;
+
     HBITMAP bitmap = 0;
     if (data->classId() == QPixmapData::RasterClass) {
         QRasterPixmapData* d = static_cast<QRasterPixmapData*>(data.data());