'VK_RIGHT'에 해당되는 글 1건

  1. 2007/08/27 Fast and Good Keyboard/Mouse Test without the message handler
2007/08/27 15:01

Fast and Good Keyboard/Mouse Test without the message handler

2007/08/27 15:01 in C, C++
In this short snippet, I will show you a Win32 function that checks whether a button is pressed or not. The good thing is that you don't need to handle the WM_KEYDOWN message. The second advantage is that it is really easy to use and that it can be used everywhere in the code. Here is the function-definition:

SHORTGetAsyncKeyState(
   int vKey // virtual-key code
);


vKey is the virtual key code of the keyboard or mouse button you want to test. GetAsyncKeyState(..) returns true if this button is pressed and false if not. I always use GetAsyncKeyState(..) for my games and demos because it can be used simply like this without a long message handle. Here is a little example how to use it:

void CheckKeyboard()
{
   //Escape is down
   if (GetAsyncKeyStateVK_ESCAPE))
   {
     PostMessage(hWnd,WM_CLOSE,0,0);
   }
 
   //Right mouse is down
   if (GetAsyncKeyStateVK_RBUTTON))
   {
      //..
      //Do something
      //..
   }
}


In this function, we will check what keys are down. You could now use this function in your main loop or somewhere else in your code. Here is a list of the most important virtual key codes:

Virtual Key Code Corresponding key on the keyboard
VK_ESCAPE Escape
VK_SPACE Space
VK_LEFT Left Arrow
VK_RIGHT Right Arrow
VK_UP Up Arrow
VK_DOWN Down Arrow
VK_SHIFT Shift
VK_CONTROL Control
VK_LBUTTON Left Mouse Button
VK_RBUTTON Right Mouse Button

Posted by Super Coder
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