Documentation for Windows Developers
Width of the screen in pixels.
Height of the screen in pixels.
Width of the vertical scroll bar arrow bitmap in pixels.
Height of the vertical scroll bar arrow bitmap in pixels.
Creates a top-level window. Has a system-defined icon, class, and base window procedure. The window has a title bar (if the WS_CAPTION style is also specified).
Creates a pop-up window. This style cannot be used with the WS_CHILD style.
Creates a child window. This window is owned by another window.
Creates a window that is initially visible.
Creates a window that is initially disabled. Disabled windows cannot receive input from the user.
The WM_PAINT message is generated whenever a portion of a window's client area needs to be repainted.
The WM_SIZE message is sent to a window after its size changes.
The WM_KEYDOWN message is posted to the input queue when a key is pressed.
The WM_LBUTTONDOWN message is generated when the user presses the left mouse button.
Sets a hook to receive graphics mode notifications.
Gets the current graphics transform matrix.
The operation completed successfully.
The handle is invalid.
The system cannot find the file specified.