The LPtoDP function converts logical coordinates into device coordinates. 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.
BOOL LPtoDP(
HDC hdc, |
// handle of device context |
LPPOINT lpPoints, |
// array of points |
int nCount |
// count of points |
); |
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero. To get extended error information, call GetLastError.
This function fails if the logical coordinates exceed 32 bits, or if the converted device coordinates exceed 27 bits. In the case of such an overflow, the results for all the points are undefined.
file: /Techref/os/win/api/win32/func/src/f55_12.htm, 2KB, , updated: 2000/4/7 12:19, local time: 2024/8/17 09:15,
18.116.62.27:LOG IN
|
©2024 These pages are served without commercial sponsorship. (No popup ads, etc...).Bandwidth abuse increases hosting cost forcing sponsorship or shutdown. This server aggressively defends against automated copying for any reason including offline viewing, duplication, etc... Please respect this requirement and DO NOT RIP THIS SITE. Questions? <A HREF="http://techref.massmind.org/techref/os/win/api/win32/func/src/f55_12.htm"> LPtoDP</A> |
Did you find what you needed? |
Welcome to massmind.org! |
Ashley Roll has put together a really nice little unit here. Leave off the MAX232 and keep these handy for the few times you need true RS232! |
.