Write PNG file failed when build exe, but run normally on the development platform

[Cray__Ho]

Thanks for Colin's solutions (http://www.colinzhang.net/2013/09/worklog-how-to-get-image-from-clipboard.html ). Perfectly solved the problem. 

Can save clipboard picture as PNG format in executable file made by LV 2017.

[colinzhang]

Great to help you on this case.

[ROK]

To Capture just the Active Window requires two keys to be pressed. ALT + PRINT SCREEN. The example mimics both keys being pressed but only releases the ALT key , leaving the PRINT SCREEN key pressed which then 'confuses' the .NET action (for me it also left most of the keyboard inactive).

SOLUTION: before releasing the ALT key insert another call to the kbd-event function to release the PRINT SCREEN key

arg1    (0x2A - PRINT SCREEN)

arg2    0

arg3    2    (Release Key)

arg4    0

Alt-PRINT SCREEN now works for me in both environments.

[ROK]

To Capture just the Active Window requires two keys to be pressed. ALT + PRINT SCREEN. The example mimics both keys being pressed but only releases the ALT key , leaving the PRINT SCREEN key pressed which then 'confuses' the .NET action (for me it also left most of the keyboard inactive).

SOLUTION: before releasing the ALT key insert another call to the kbd-event function to release the PRINT SCREEN key

arg1    (0x2A - PRINT SCREEN)

arg2    0

arg3    2    (Release Key)

arg4    0

Alt-PRINT SCREEN now works for me in both environments.

[Andre_FR]

Hi All: I'm now using LabVIEW 2023 32-bit and it looks that the bug is still present.
I tried the solutions of this thread without any successs.

For others who have the similar problem (not able to read the ciipboard image when run as exe) I have a workaround.
Use this solution using a .net 8 dll that does the job.

I tested it with LV2023 and for me it works great, it only reads 24 bit images.

[Andrey_Dmitriev]

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@Andre_FR wrote:

For others who have the similar problem (not able to read the ciipboard image when run as exe) I have a workaround.

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Or, alternatively, you can use IMAQ ClipboardToImage, but this function is only available if the Vision Development Toolkit is installed (by the way, the "opposite" IMAQ ImageToClipboard VI is also exist.)