Windows: Fullscreen QML application is not visible in grabWindow of primary screen.

When opening a full screen QML application, then grabbing primary screen for a screen shot, the screenshot only contains the desktop while QML application is not visible.

This behavior differs between Windows 10 (32bit) and Windows 10 (64bit). In 32bit Win10 the full screen application is included in the screen capture.

Windows 7, 8, 8.1 and 10 when using 64bit all only show desktop without the full screen app.

Steps to reproduce:

• Run attached sample
• Observe primary screen turning to a red full screen QML application
• EXPECTED: Screenshot saved next to the exe contains the red QML application
• ACTUAL: Screenshot saved next to the exe contains desktop without the fullscreen QML application