Thanks all, One more thing, when i tried to execute a sample application ( with Direct X ) am getting the following error especially with "strmif.h" stating at "typedef DWORD_PTR HSEMAPHORE; " as missing ;(semicolon) also, unexpected end of file... I have neither modified this file..nor did create this file..in VC 6 application., Can u guide me the root cause for this problem ? should i change/set any parameters for the same..?? Thanks in advance, Pramod.