Answer to Question #272973 in C++ for Baneen

Question

What can "GetLastError()" function do, explain?

Answer 1

The GetLastError function returns the calling thread's last-error code value. The last-error code is maintained on a per-thread basis. Multiple threads do not overwrite each other's last-error code.

#include <windows.h>
#include <stdio.h>
#include <iostream>
using namespace std;
int main()
{
    HANDLE hConsole = GetStdHandle(STD_OUTPUT_HANDLE);
    SMALL_RECT wSize = { 0,0,60,20 }; 
    if (hConsole == nullptr) {
        cout << "Console Handle is Null" << endl;
        return 1;
    }
    else {
        char message[256];
        if (!SetConsoleWindowInfo(hConsole, TRUE, &wSize)) {
            #ifdef PURIST
            DWORD eCode = GetLastError();
            sprintf(message, "SetConsoleWindowInfo failed; code = %d!", eCode);
            #else
            sprintf(message, "SetConsoleWindowInfo failed; code = %d!", GetLastError());
            #endif
        }
        else {
            strcpy(message, "SetConsoleWindowInfo call succeeded!");
        }
        cout << message << endl;
    }
    getchar(); 
    return 0;
}