> One method is to provide a 'mirror driver' to intercept the all calls > from GDI to the display driver (this should be the method used by > Netmeeting).
But that requires a device driver doesn't it? (i.e. code that runs in kernel mode). Hooking into user32.dll only requires code that runs in user mode - so is a lot easier to get right. > As the windwos sample code probably is limited by some licensing issues > the driver probably has to be developed without this code - but IANAL. The DDK is a free download (it does say you need VC 5 or 6 to compile drivers - I've never tried with gcc). Stuart
