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LB_ITEMFROMPOINT Overview  Group

An application sends this message to retrieve the zero-based index of the item nearest the specified point in a list box.

LB_ITEMFROMPOINT 

wParam = 0;                                // not used, must be zero 

lParam = (LPARAM) MAKELPARAM(xPos, yPos);  // coordinates of point 

 

Parameters

xPos
Value of the low-order word of lParam. Specifies the x-coordinate of a point, relative to the upper-left corner of the client area of the list box.
yPos
Value of the high-order word of lParam. Specifies the y-coordinate of a point, relative to the upper-left corner of the client area of the list box.

Return Values

The return value contains the index of the nearest item in the low-order word. The high-order word is zero if the specified point is in the client area of the list box, or one if it is outside the client area.


file: /Techref/os/win/api/win32/mess/src/msg10_18.htm, 1KB, , updated: 2000/4/7 11:20, local time: 2024/11/8 03:33,
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