使用Windows API擷取和改變當前顯示設定

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

void main()
{
    DEVMODE devmode,oldmode;
    EnumDisplaySettings(NULL,ENUM_CURRENT_SETTINGS,&devmode);
    ZeroMemory(&oldmode,sizeof(DEVMODE));
    CopyMemory(&oldmode,&devmode,sizeof(DEVMODE));
    printf("BitsPerPel:%d\n",devmode.dmBitsPerPel);
    printf("DisplayFrequency:%d\n",devmode.dmDisplayFrequency);
    printf("PelsWidth:%d\n",devmode.dmPelsWidth);
    printf("PelsHeight:%d\n",devmode.dmPelsHeight);
    printf("Press any key to change display...\n");
    getch();
    printf("BitsPerPel:%d\n",devmode.dmBitsPerPel=16);
    printf("DisplayFrequency:%d\n",devmode.dmDisplayFrequency=60);
    printf("PelsWidth:%d\n",devmode.dmPelsWidth=800);
    printf("PelsHeight:%d\n",devmode.dmPelsHeight=600);
    ChangeDisplaySettings(&devmode,0);
    printf("Press any key to restore...\n");   
    getch();
    printf("BitsPerPel:%d\n",oldmode.dmBitsPerPel);
    printf("DisplayFrequency:%d\n",oldmode.dmDisplayFrequency);
    printf("PelsWidth:%d\n",oldmode.dmPelsWidth);
    printf("PelsHeight:%d\n",oldmode.dmPelsHeight);
    printf("Press any key to change display...\n");
    ChangeDisplaySettings(&oldmode,0);
    getch();
}