#include <windows.h>
#include <stdio.h>

int main(void)
{
    BOOL b1, b2;

    // Rename explorer.exe as explorer_old.exe.
    b1 = MoveFileExA(
        "C:\\ReactOS\\explorer.exe",
        "C:\\ReactOS\\explorer_old.exe",
        MOVEFILE_DELAY_UNTIL_REBOOT | MOVEFILE_REPLACE_EXISTING);

    // Overwrite explorer.exe with explorer_new.exe.
    b2 = MoveFileExA(
        "C:\\ReactOS\\explorer_new.exe",
        "C:\\ReactOS\\explorer.exe",
        MOVEFILE_DELAY_UNTIL_REBOOT | MOVEFILE_REPLACE_EXISTING);

    if (b1 && b2)
        printf("Success\n");
    else
        printf("Failure\n");

    printf("Press ENTER key\n");
    getchar();
    return 0;
}