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Overview |
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Group |
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Quick Info
Windows NT
| Yes
| Win95
| Yes
| Win32s
| Yes
| Import Library
| user32.lib
| Header File
| winuser.h
| Unicode
| No
| Platform Notes
| None
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MapWindowPoints
The MapWindowPoints function converts (maps) a set of points from a coordinate space relative to
one window to a coordinate space relative to another window.
int MapWindowPoints(
HWND hWndFrom,
| // handle of window to be mapped from
| HWND hWndTo,
| // handle of window to be mapped to
| LPPOINT lpPoints,
| // address of structure array with points to map
| UINT cPoints
| // number of structures in array
| );
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Parameters
hWndFrom
Identifies the window from which points are converted. If this parameter is
NULL or HWND_DESKTOP, the points are presumed to be in screen coordinates.
hWndTo
Identifies the window to which points are converted. If this parameter is NULL
or HWND_DESKTOP, the points are converted to screen coordinates.
lpPoints
Points to an array of POINT structures that contain the set of points to be converted. This parameter can
also point to a RECT structure, in which case the cPoints parameter should be set to 2.
cPoints
Specifies the number of POINT structures in the array pointed to by the lpPoints parameter.
Return Values
If the function succeeds, the low-order word of the return value is the number
of pixels added to the horizontal coordinate of each source point in order to
compute the horizontal coordinate of each destination point; the high-order
word is the number of pixels added to the vertical coordinate of each source point
in order to compute the vertical coordinate of each destination point.
See Also
ClientToScreen, POINT, RECT, ScreenToClient
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