Thread: C++ keybd_event code

Hi i'm trying to understand keybd_event a little more, and was testing it on other programs and find that it doesnt do the same as it would if I press the keys myself. On word pad it seems to do what I tell it to do in code fine but when I use it on other programs it doesnt do the same.

For example

Code:

keybd_event(VK_NUMPAD0,60,0,0); 
keybd_event(VK_NUMPAD0,60, KEYEVENTF_KEYUP, 0);

press the Numpad 0 making a 0 in word pad but when I use the same way on another program that used the numpad 0 to do things it doesnt react as if I was to just press the key. Tried using spy++ to see what it got, and I found it had a WM_CHAR in the middle of the WM-keyup and down. The Char showed 2 differnt things when I used either the code above and when I just pressed the key myself. Was giving me a wParam 0x00000030 and a lParam of 0x00520001 with a normal pressing and a wParam 0x00000030 and lParam of 0x003c0001 when I used that code above. I tried look it up on NSDM but I kinda dont unerstand the site and was hoping someone could help me make sencs on whats happening and could give me a little soure code to help me out on what I could fixs?

I have problems with that function too. Try VK_SHIFT. It will push it, but won't let it back up.
Sorry though, I still havn't found a solution.

Originally Posted by Queatrix

I have problems with that function too. Try VK_SHIFT. It will push it, but won't let it back up.
Sorry though, I still havn't found a solution.

Try something like this...

Code:

  void meleft(){
   keybd_event(0x10,0,0,0);
   keybd_event(0xbc,0,0,0);
   keybd_event(0xbc,0,KEYEVENTF_KEYUP,0);
   keybd_event(0x10,0,KEYEVENTF_KEYUP,0);}

As for the KEYEVENTF_KEYDOWN it doesnt work, "`KEYEVENTF_KEYDOWN' undeclared (first use this function)"

Can you give me some examples for SendInput() cus I dont understand MSDN too good lol.

Code:

DWORD dwRet = 0;
keyboard = {0, VK_RETURN, KEYEVENTF_UNICODE, NULL, &dwRet };
INPUT input[ ] = { { INPUT_KEYBOARD, NULL, keyboard, NULL }, NULL };
UINT siRet = SendInput(1, &input, sizeof(input)));

I don't know if this works (I just made it on the fly) but it should give you the idea.
Also: SendInput() func doc