利用windows API更改显示器的分辨率和更改双屏的显示模式

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本文介绍如何使用DEVMODE结构在Windows系统中调整屏幕分辨率的方法，并提供了两种不同情况下的示例代码，一种适用于Windows 8，另一种针对Windows 7。此外还介绍了如何通过命令行工具改变多显示器的显示模式。

//更改显示屏的分辨率（windows8）
DEVMODE dmScreenSettings;
memset(&dmScreenSettings,0,sizeof(dmScreenSettings));
dmScreenSettings.dmSize = sizeof(dmScreenSettings);
EnumDisplaySettings(NULL, ENUM_CURRENT_SETTINGS, &dmScreenSettings);
dmScreenSettings.dmPelsWidth = 1024;
dmScreenSettings.dmPelsHeight = 768;
ChangeDisplaySettings(&dmScreenSettings,CDS_FULLSCREEN);
system("pause");

//上述方法在windows7上不太适用，针对以上做以下更改

//设置屏幕的分辨率
DEVMODE dmScreenSettings;
memset(&dmScreenSettings,0,sizeof(dmScreenSettings));
dmScreenSettings.dmSize = sizeof(dmScreenSettings);
dmScreenSettings.dmBitsPerPel = 32;
dmScreenSettings.dmFields = DM_PELSWIDTH|DM_PELSHEIGHT|DM_BITSPERPEL;
dmScreenSettings.dmPelsWidth = 1440;
dmScreenSettings.dmPelsHeight = 900;
long result = ChangeDisplaySettings(&dmScreenSettings,0);
if (result == DISP_CHANGE_SUCCESSFUL)
{
MessageBox(NULL,TEXT("分辨率修改成功！"),TEXT("提示"),MB_ICONEXCLAMATION|MB_OK);
ChangeDisplaySettings(&dmScreenSettings,CDS_UPDATEREGISTRY);
}
else
{
MessageBox(NULL,TEXT("分辨率修改失败"),TEXT("提示"),MB_ICONEXCLAMATION|MB_OK);
ChangeDisplaySettings(NULL,0);
}

//更改屏幕多屏幕的显示模式
system ("DisplaySwitch.exe /clone"); //屏幕复制
system ("DisplaySwitch.exe /extend"); //屏幕扩展
system ("DisplaySwitch.exe /internal");//仅电脑屏幕
system ("DisplaySwitch.exe /external"); //仅第二屏幕