Why can't I create process in vs2022-CodePudding

I am new to programming. I want simply create a process , but it always fail.

This is the code.

#include <Windows.h>
#include <atlconv.h>
#include <iostream>

wchar_t* atw(const char* oc)
{
    USES_CONVERSION;
    return A2W(oc);
}

int main() {
    STARTUPINFO si;
    PROCESS_INFORMATION pi;
    ZeroMemory(&si, sizeof(si));
    ZeroMemory(&pi, sizeof(pi));
    if (CreateProcess(
        NULL,   
        atw("E:\\AFolder\\AProgram.exe"),
        NULL, 
        NULL, 
        false,  
        NULL,  
        NULL, 
        atw("E:\\AFolder"),
        &si, 
        &pi  
    ))
    {
        //do something
    }
    else {
        //do something
    }
    ...
}

"AProgram.exe" and "AFolder" are just symbols , I am sure they exist and can run.

Also, my native language is not English, plesae ignore some possible language mistakes and cultural conflict

CodePudding user response：

I'm afraid than atw() return a dangling pointer.

check A2W implementation details and warnings from the compiler.

your usage of A2W is wrong.

possible solutions :

std::wstring atw(const char* oc)
{
    USES_CONVERSION;
    return A2W(oc);
}

or use A2W directly in main