Memo on Visual C++ Debugger

I look for the following in MSDN sometimes:

_crtBreakAlloc

It is the global variable to set bugging break at memory leak position by VC debugger.
If crt is DLL(msvcrtd), use "{,,msvcr71d.dll}_crtBreakAlloc" instead of this.

err

It is the global variable of VC for debugging, which always hold the result of GetLastError.

hr

It means the value with the hr on VC's watch windows as HRESULT type .

wm

It means the value with the wm on VC's watch windows as WM_MESSAGE type.