I want to draw a line

[shirsoft]

I have some free time on my hand so I wanted to fiddle with the windows graphics subsystem.

Basically I want to intercept any gdi calls like drawing a line and override it.

I initially thought it was residing in gdi32.dll. After writing a stub for the same I realized that gdi32 is just a wrapper over win32k.sys. At this point I am stumpped. I have a vague feeling that I should write a filter driver but I am not sure. All of this was due to inspiration from the vista dwm. I dont intend to implement it but would like to go ahead till I have fun.

A fig would be(not sure if i am right)

drawEdge->gdi32->[my driver/dll]->win32k.sys->displaydriver

Thanks