%systemroot% : the directory of windows (if you are using XP it's probably c:\windows, if you are using NT/2000 it's probably c:\winnt). Check in the Windows online help "Environment Variables", type SET PATH on command prompt and get the content of the PATH env var. You'll see ";"-separated list of paths, append the path of the Mathlab DLL folder you found w/ the method I have explained earlier. Probably you 'll need a help by someone more expert in the dept you are working...

Vimal Earnest wrote: extern "C" { #include "yourheader.h" } This is generally not a good idea. yourheader.h may include other header files that contain C++ code (windows system files, for example). A better way to do it is to put #if defined( __cplusplus ) extern "C" { #endif // defined( __cplusplus ) inside yourheader.h before declarations (but after includes) and #if defined( __cplusplus ) } #endif // defined( __cplusplus ) inside yourheader.h at the end.

damn, thats a bold 'goto' statement. to hell with efficiency, long live 'goto' lol! ! todo.... :: insert inpirational text here ::

yes, look at the MSDN, it says _A_SUBDIR Subdirectory. Value: 0x10 Or use FindFirstFile If I have seen further it is by standing on the shoulders of Giants. - Isaac Newton 1676

My semi-educated guess: that your program is getting more scheduled time and can therefore respond quicker to the WM_TIMER message. My guess is that if there was another program consuming more CPU than yours, you might take longer to respond. Joel Lucsy (jjlucsy@concentric.net)