Windows.h key event

For example, when a key is held down, you might get five events with this member equal to 1, one event with this member equal to 5, or multiple events with this member greater than or equal to 1. This member can be one or more of the following values. Keyboard input events are generated when any key, including control keys, is pressed or released. However, the ALT key when pressed and released without combining with another character, has special meaning to the system and is not passed through to the application.

For an example, see Reading Input Buffer Events. Skip to main content. If i'm not mistaken, most anti-virus programs flag any programs that use GetAsyncKeyState as a keylogger. Jun 30, at am UTC. It is not constantly running. This means x gets reset to 50 every time a message is processed ie: every time the screen is drawn.

Since you modify x AFTER setting the pixel, you are always setting the pixel at coord 80,80 -- and the addition afterwards does nothing. If something happens that causes several repaints per second like dragging another window over this one , if 'D' is being held down, that pixel will FLY across the window super fast. When your program is idle nothing will happen. Also, using goto here is a bad idea for many reasons. Win32 supports these all events also.

This code identifies the key being pressed or released. This is same as used in Java programming languages. Not surprise because JVM is written in Win H header file. When you process a keystroke message, you may need to know whether any of the shift keys Shift,Ctrl, and Alt or toggle keys Caps Lock, Num Lock, and Scroll Lock are pressed. You can obtain this information by calling the GetKeyState function.