ExtTextOut in IE

[Thanh Do]

I used API hook to intercept API functions in IE. But its ExtTextOutA/W are strange. They always use co-ordinate of (0,0) to draw lines of text, from the top to the bottom of the screen! I also verified its DC attributes (ex: viewport/window org.), but they seem normal. So how could it do that?

[darwen]

Maybe its drawing into a bitmap, and then presenting the bitmap to screen.

The other thing you can check is the window coordinates of the DC.

Darwen.

[Thanh Do]

Maybe its drawing into a bitmap, and then presenting the bitmap to screen.

The other thing you can check is the window coordinates of the DC.

Darwen.

Thank u very much. I think that's the way it use. I intercepted BitBlt and got the image. And the rect that I invalidated was in the middle of a large image 8-((. So how can I check the window coordinates of the DC to get that rect?
Thanks in advance