Question with C #
I copied the following code from http://www.codeproject.com/KB/cs/CSLLKeyboardHook.aspx ,
public int hookProc(int code, int wParam, ref keyboardHookStruct lParam)
{
if (code >= 0)
{
Keys key = (Keys)lParam.vkCode;
if (HookedKeys.Contains(key))
{
KeyEventArgs kea = new KeyEventArgs(key);
if((wParam == WM_KEYDOWN || wParam == WM_SYSKEYDOWN) && (KeyDown != null))
{KeyDown(this, kea) ;}
else if ((wParam == WM_KEYUP || wParam == WM_SYSKEYUP) && (KeyUp != null))
{KeyUp(this, kea); }
if (kea.Handled)
{return 1;}
}
}
lParam.vkCode ++;
lParam.scanCode ++;
return CallNextHookEx(hhook, code, wParam, ref lParam);
}
It works great, but when I make a small change:
lParam.vkCode ++;
or
lParam.scanCode ++;
right before CallNextHookEx (...) returns, the original keys are still displayed in Notepad. Ex. If I press "a", I expect the letter in Notepad to be "b", but still "a". It looks like "lParam" is not changing. Couldn't understand why?
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The lParam.vkCode value is not a simple int type, so I don't think you can increase it that way.
once you have your key object ...
Keys key = (Keys)lParam.vkCode;
You should be able to do something like getting a byte value and incrementing it.
int keyVal = Encoding.ASCII.GetByte(key.KeyCode);
keyVal++;
I think vkCode is not an actual key code, but maybe a pointer or something else, assigning it to a Key.Net variable that pulls this value in and with your lit, converts it to the type of the managed key.
Of course I could be wrong ...
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