TB_HITTEST


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TB_HITTEST
TB_HITTEST
    wParam = 0;
    lParam = (LPARAM)(LPPOINT)pptHitTest; 
Determines where a point lies in a toolbar control.
Returns an integer value. If the return value is zero or a positive value, it is the zero-based index of the nonseparator item in which the point lies.
If the return value is negative, the point does not lie within a button. The absolute value of the return value is the index of a separator item or the nearest nonseparator item.

pptHitTest
Address of a point structure that contains the x-coordinate of the hit test in the x member and the y-coordinate of the hit test in the y member. The coordinates are relative to the toolbar's client area.

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