WM_MBUTTONDBLCLK top-level constant Null safety

int const WM_MBUTTONDBLCLK

Posted when the user double-clicks the middle mouse button while the cursor is within the nonclient area of a window. This message is posted to the window that contains the cursor. If a window has captured the mouse, this message is not posted.

Implementation

const WM_MBUTTONDBLCLK = 0x0209;