https://community.intel.com/t5/Intel-Fortran-Compiler/need-a-help/m-p/795112#M34715 hello,<BR />i get stuck! i reaaly need to know if i can draw a graphic on a windows client area, or calling graphic from menu bar. i am trying to understand gdi, but it is hard. is this posssible to do that? if yes, is there anyone who tried it before? could you help me?<BR /> Thu, 24 Jul 2003 16:52:13 GMT Intel_C_Intel 2003-07-24T16:52:13Z https://community.intel.com/t5/Intel-Fortran-Compiler/need-a-help/m-p/795112#M34715 hello,<BR />i get stuck! i reaaly need to know if i can draw a graphic on a windows client area, or calling graphic from menu bar. i am trying to understand gdi, but it is hard. is this posssible to do that? if yes, is there anyone who tried it before? could you help me?<BR /> Thu, 24 Jul 2003 16:52:13 GMT https://community.intel.com/t5/Intel-Fortran-Compiler/need-a-help/m-p/795112#M34715 Intel_C_Intel 2003-07-24T16:52:13Z https://community.intel.com/t5/Intel-Fortran-Compiler/need-a-help/m-p/795113#M34716 The most important concept you must have in mind is that Windows doesn't do the screen buffering for you; instead, every application is being <B>informed</B> via WM_PAINT message that it should update its screen. WM_PAINT is sent whenever a portion of the window is revealed; application is supposed to do a BeginPaint, draw onto supplied device context (DC), and call EndPaint to tell Windows that it has updated the screen OK and that the update rectangle is now valid.<BR /><BR />However, if you draw directly (using e.g. Rectangle) on supplied DC, the window contents will flicker during moving/sizing, as updating takes considerable time. Thus, any non-trivial application usually does double-buffering itself -- it creates an off-screen (memory) DC and it just "copies&amp;pastes" its contents onto DC returned by BeginPaint.<BR /><BR />I wouldn't say GDI is hard; rather, it's a bit boring, because you have to take care to create and delete GDI objects yourself. Attached workspace uses double-buffering technique and my XFTGDI module, which is a thin wrapper around most frequently used GDI calls; you can find the documentation (.chm) <A href="http://www.geocities.com/jdujic/fortran/xft/xfthome.htm">here</A>. Make sure you read the Platform SDK/Graphic and Multimedia services/GDI/Painting and Drawing chapter first.<BR /><BR />(Attachment in the followup. My additions to wizard-generated code are clearly marked).<BR /><BR />Jugoslav Thu, 24 Jul 2003 18:25:52 GMT https://community.intel.com/t5/Intel-Fortran-Compiler/need-a-help/m-p/795113#M34716 Jugoslav_Dujic 2003-07-24T18:25:52Z https://community.intel.com/t5/Intel-Fortran-Compiler/need-a-help/m-p/795114#M34717 Here it is. Thu, 24 Jul 2003 18:45:24 GMT https://community.intel.com/t5/Intel-Fortran-Compiler/need-a-help/m-p/795114#M34717 Jugoslav_Dujic 2003-07-24T18:45:24Z https://community.intel.com/t5/Intel-Fortran-Compiler/need-a-help/m-p/795115#M34718 hi, <BR />thank you for your kindly respond. i will try to understand what you wrote... Tue, 29 Jul 2003 14:23:54 GMT https://community.intel.com/t5/Intel-Fortran-Compiler/need-a-help/m-p/795115#M34718 Intel_C_Intel 2003-07-29T14:23:54Z