Just for fun

[Grincheux]

After you create the main window, add the following lines

Code Select Expand

SetWindowDisplayAffinity(hWndMain,3) ;

Now, lauch the program, take a screen shot.
Launch a window editor and paste your screen shot...

[John Z]

Parameter value 3 (WDA_EXCLUDEFROMCAPTURE) on MS help on SetWindowDisplayAffinity....
it did/does prevent prtsc, and IrfanView from copying the window image for the program I put
it into.

Probably there is already a workaround developed to do the capture. I imagine a device driver or system service could get around this.

It did surprise me when my program window disappeared .... 

John Z