Question and Answer Database FAQ2035C.txt MapDialogRect vs. GetWindowRect Category :Windows API Platform :All Product :C++Builder ALL Question: I've loaded a dialog from a resource file, and i've used MapDialogRect to calculate its screen position. The coordinates returned by MapDiagRect, however, have no apparent relationship to the coordinates returned by GetWindowRect. Why? Answer: There are actualy two problems inherent in what you are trying to do. First off, GetWindowRect returns the rectangle of the external bounding frame of the window --- which is to say, the title bar and frame are within the rectangle --- while MapDialogRect returns the rectangle for the client area. (That can be demonstrated by calling GetClientRect on the area and comparing its values to the values returned by the two previous functions.) The other problem is this: while GetWindowRect returns a rectangle whose coordinates are screencoordinates, that is, they are relative to the upper left hand corner of your screen, MapDialogRect returns a rectangle whose coordinates are relative to the client area of the parent window. Thus, while the rectangles actually describe the same window, they are applied to different coordinate schemes, and so look different upoon inspection. 7/2/98 10:32:32 AM
Last Modified: 01-SEP-99