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LPtoDP
..msdn Add comment W32 Constants Translate this page |
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Converts logical coordinates into device coordinates. |
| | | Code examples: | | |
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| | | Declaration: | | |
BOOL LPtoDP(
HDC hdc, // handle to device context
LPPOINT lpPoints, // array of points
int nCount // count of points in array
);
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| | | | FoxPro declaration: | | |
DECLARE INTEGER LPtoDP IN gdi32;
INTEGER hdc,;
STRING @lpPoints,;
INTEGER nCount
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| | | | Parameters: | | hdc
[in] Handle to the device context.
lpPoints
[in/out] Pointer to an array of POINT structures. The x-coordinates and y-coordinates contained in each of the POINT structures will be transformed.
nCount
[in] Specifies the number of points in the array. |
| | | Return value: | | | If the function succeeds, the return value is nonzero. |
| | | My comment: | | The conversion depends on the mapping mode of the device context, the settings of the origins and extents for the window and viewport, and the world transformation.
LOCAL hWindow, hDC, cBuffer
hWindow = _screen.HWnd
hDC = GetWindowDC(hWindow)
cBuffer = num2dword(100) + num2dword(100)
? LPtoDP(hDC, @cBuffer, 1)
? buf2dword(SUBSTR(cBuffer,1,4)),;
buf2dword(SUBSTR(cBuffer,5,4))
= ReleaseDC(hWindow, hDC)
See also: DPtoLP
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| | | Word Index links for the LPtoDP : | | |
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| | | Translate this page: | | | | | | • | | | Created: | 2007-04-27 12:56:39 | | Modified: | 2007-04-27 12:59:53 |
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