CreateProcess() Error

Question

STARTUPINFO si;
PROCESS_INFORMATION pi;
memset(&si, 0, sizeof(si));
memset(&pi, 0, sizeof(pi));
si.cb = sizeof(si);

LPCWSTR procName =(LPCWSTR)\"D:\\\\test          


        

Answer 1

You use the L prefix to make a wide character string:

L"D:\\test dir 1\\Calc.exe";

Casting a string literal to a different character width does not make a string wider.

Answer 2

In addition to the string type issue already pointed out, the second argument (lpCommandLine) must point to a writable buffer, not a constant string. You can do this by declaring it as follows:

WCHAR procArg[] = L"blacknull";

This is documented in MSDN: "The Unicode version of this function, CreateProcessW, can modify the contents of this string. Therefore, this parameter cannot be a pointer to read-only memory (such as a const variable or a literal string). If this parameter is a constant string, the function may cause an access violation."