help user32 userlib
Blitz3D Forums/Blitz3D Userlibs/help user32 userlib
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Hi all, I've try to use the user32 userlib but many functions in it need uses of pointers, for example, if I would know the position of mouse cursor using api_GetCursorPos%(lpPoint*) how I should use the pointer to get the X and Y coords??? Thanks All for help, mongia2 |
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In general, the first thing I do in these situations is search on Google to pull up the MSDN documentation on the command, which in this case is here: http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/resources/cursors/cursorreference/cursorfunctions/getcursorpos.asp In this case, the command takes a pointer, as you noted. The documentation says it needs a pointer to a Point structure, and provides a link. If you click that link, you will see that the structure is two longs, which are the same as integers. So, to make it work, you need to do something like this (I haven't tested, but it should work): lpPoint = createbank(8);big enough to handle two integers result = api_GetCursorPos%(lpPoint) if result = 1 ;if it worked x = peekint(lpPoint,0) y = peekint(lpPoint,4) end if freebank lpPoint For another working example, see TotalSysMem() and AvailSysMem() at the bottom of this code archive entry: www.blitzbasic.com/codearcs/codearcs.php?code=1233 |