| BOOL PtInRegion(hrgn, nXPos, nYPos) | ||||
| HRGN hrgn; | /* handle of region, */ | |||
| int nXPos; | /* x-coordinate of point, */ | |||
| int nYPos; | /* y-coordinate of point, */ | |||
The PtInRegion function determines whether a specified point is in the given region.
hrgn
Identifies the region to be examined.
nXPos
Specifies the logical x-coordinate of the point.
nYPos
Specifies the logical y-coordinate of the point.
The return value is nonzero if the point is in the region. Otherwise, it is zero.
The following example uses the PtInRegion function to determine whether the point (50, 50) is in the specified region and prints the result:
HRGN hrgn;
BOOL fPtIn;
LPSTR lpszInRegion = "Specified point is in region.";
LPSTR lpszNotInRegion = "Specified point is not in region.";
fPtIn = PtInRegion(hrgn, 50, 50);
if (!fPtIn)
TextOut(hdc, 10, 10, lpszNotInRegion,
lstrlen(lpszNotInRegion));
else
TextOut(hdc, 10, 10, lpszInRegion, lstrlen(lpszInRegion));