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 Forums >>  Debuggers  >>  Break on access at 0x96013094

Topic created on: April 21, 2009 17:13 CDT by j062857 .

Is there a way using olly to break on access at memory address 0x96013094 (its a hdc of a window).
I'm Reverse engineering a program and I want to see which functions it calls using that hdc.

  rabies     April 22, 2009 00:11.56 CDT
Yes, you can set a hardware breakpoint on read access.

  j062857   April 22, 2009 13:31.21 CDT
doesn't work, it gives me "Address points to nowhere"

  SamB   April 23, 2009 08:14.21 CDT
Aren't GDI handles generally handled in the kernel? That would presumably mean that read breakpoints wouldn't catch them, regardless of whether or not they are pointers to anything, would it not?

I think you'd need to set conditional breakpoints on all the HDC calls (where the condition, of course, is that the appropriate argument is that HDC).

Or maybe there is a GDI tracing tool you could use?

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