Redirecting Windows dialog error messages to conso

Question

Does anyone know how to redirect/capture modal Windows error dialogs? This is really problematic for non-interactive, command-line programs that are merely trying to run a program and capture the exit code and stdout/stderr output.

The most recent instance of this issue is a modal Windows dialog that has the following form:

The program can't start because <foo.dll> is missing from your computer. Try reinstalling the program to fix this problem.

(Where the title of the modal GUI window is "System error")

Answer 1

These system error dialogs can be suppressed with SetErrorMode(). In that case, CreateProcess() should fail and GetLastError() should give you the corresponding error code.