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#define INCL_WININPUT
 
WM_BUTTON1DBLCLK
x = (SHORT) SHORT1FROMMP(mp1);     /* horizontal position */
y = (SHORT) SHORT2FROMMP(mp1);     /* vertical position   */
 
The WM_BUTTON1DBLCLK message is sent when the user double-clicks the left
mouse button.
 
Parameter  Description
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x          Low word of mp1. Indicates the horizontal position of the mouse
           pointer (in window coordinates).
 
y          High word of mp1. Indicates the vertical position of the mouse
           pointer (in window coordinates).
 
 
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