:biggrin:
For those with a sense of humour, this wasted some hours trying to figure out why "keybd_event" did not work.
Ala Microsoft,
Quote
An application can simulate a press of the PRINTSCREEN key in order to obtain a screen snapshot and save it to the Windows clipboard. To do this, call keybd_event with the bVk parameter set to VK_SNAPSHOT, and the bScan parameter set to 0 for a snapshot of the full screen or set bScan to 1 for a snapshot of the active window.
Ready to scrap the idea, I tried the other constant "KEYEVENTF_EXTENDEDKEY" and BINGO it works like a charm.
rcall ShowWindow,hWin,SW_HIDE
rcall SleepEx,250,0
rcall keybd_event,VK_SNAPSHOT,0,KEYEVENTF_EXTENDEDKEY,0
rcall SleepEx,250,0
rcall ShowWindow,hWin,SW_SHOW
Ah Microsoft, you've dunnit again. :skrewy:
:thumbsup: Nice you have succeeded.
Hi Hutch,
Thanks for the code :thumbsup: It works well with my clipboard tool :
main PROC uses esi
LOCAL hBmp :DWORD
LOCAL pBitmap :DWORD
LOCAL hGlobal :DWORD
LOCAL pcbSize :DWORD
LOCAL pStream :DWORD
LOCAL pd :PICTDESC
lea esi,buffer
invoke ParseCmdLine,esi
cmp eax,2
je @f
invoke StdOut,ADDR message
ret
@@:
invoke keybd_event,VK_SNAPSHOT,0,KEYEVENTF_EXTENDEDKEY,0
invoke SleepEx,250,0
invoke GetDesktopWindow
invoke OpenClipboard,eax
invoke GetClipboardData,CF_BITMAP
mov hBmp,eax
invoke CloseClipboard
.
.
Hi Erol,
I have been tracking down a problem with an old app that if it crashes, it makes a mess of the clipboard and the closest I can come to fixing it is to close then clear the clipboard. The current test code,
rcall CloseClipboard ; close and clear the clipboard
rcall EmptyClipboard
rcall keybd_event,VK_SNAPSHOT,0, \
KEYEVENTF_EXTENDEDKEY,0 ; capture screen to clipboard
rcall SendMessage,HWND_BROADCAST, \
WM_CHAR,VK_SNAPSHOT,0 ; backup technique
Funny enough the "SendMessage" version also works OK but as it is placed in the message queue, its too slow. I included it to ensure the keyup was done correctly.
Hi Hutch,
Thanks for the update. I will update my Poasm example.
Next trick, is to put it into mpeg4 format with sound ;)
I might look at that if I have time :thumbsup: