c++ - How to set the top/bottom margins of a Win32 richedit -


we can use em_setmargins message set left/right margins of richedit control. don't know how set top/bottom margins. body knows? thanks.

use em_getrect / em_setrect message combination modify margins:

        rect rc;         // current control rectangle         sendmessage(hwndrichedit, em_getrect, 0, (lparam)&rc);         rc.left += 20; // increase left margin          rc.top += 20; // increase top margin         rc.right -= 20; // decrease right margin         rc.bottom -= 20; // decrease bottom margin (rectangle)         // set rectangle         sendmessage(hwndrichedit, em_setrect, 0, (lparam)&rc);

the resulting control has 4 margins:

richedit control 20px margins

update: per barmak shemirani , iinspectable comments below use getclientrect function current rectangle , inflaterect function manipulate rectangle / margin dimensions.


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