Hey!

Well, I've RTFM and it doesn't say much about how the source and source files windows are used... Do I have to compile the exe/dll using some specific flags and then put the C source file somewhere???

I know this may me a generic question, but I've mostly debugged without having access to the source so far.

yup, you need to compile with debug information (Borland or Microsoft)
for example, with MASM:

\masm32\bin\ml /c /coff /Zi main.asm
\masm32\bin\Link /DEBUG /DEBUGTYPE:CV /SUBSYSTEM:WINDOWS main.obj

then you will see the source line on info pane (under the CPU window) and
you can use CTRL+F5 to view the entire source file.

it is groovy

Is it only possible to use it with programs writen in asm?

of course not every compiler that makes debug info works ... i tried with Visual C and C-- -> works perfectly.

just look for command switches for you compiler.

[TIP] click on CPU header bar (that with Address|Hex dump|Disassembly|Comment) on Comment tab to switch between Comment->Source->Profile. handy!

I try with Delphi and Borland C++ builder - also work excelent