如何获取系统当前的显示分辨率和颜色设置？

[flood75]

在VC编程中如何取得系统当前的颜色深度（如8色、256色、16M彩色、32M彩色等）以及屏幕的分辨率。

[striking]

取屏幕分辨率：
HDC screenDC;
screenDC = CreateDC("DISPLAY", NULL, NULL, NULL);


int nLogDPIX = GetDeviceCaps(screenDC, LOGPIXELSX);
int nLogDPIY = GetDeviceCaps(screenDC, LOGPIXELSY);

DeleteDC(screenDC);

[zhaowuqing]

//获取系统信息中声音设备和分辨率
WAVEOUTCAPS wavecap;
MIDIOUTCAPS midicap;
wavedevice=(int)waveOutGetNumDevs(); //波形设备信息
mididevice=(int)midiOutGetNumDevs(); // MIDI设备信息
if (wavedevice!=0){
waveOutGetDevCaps(0,&wavecap,sizeof(WAVEOUTCAPS));
cs="当前波形设备:"+String(wavecap.szPname)+"\n";
fwrite(cs.c_str(),cs.Length(),1,fp);
}
if (mididevice!=0){
midiOutGetDevCaps(0,&midicap,sizeof(MIDIOUTCAPS));
cs="当前MIDI设备:"+String(midicap.szPname)+"\n";
fwrite(cs.c_str(),cs.Length(),1,fp);
}
long double tcs;
long double tc;
long int bpp,cp;
cs="当前分辨率为:"+String(Screen->Width)+AnsiString("*")+ String(Screen->Height)
+"\n";
fwrite(cs.c_str(),cs.Length(),1,fp);
bpp=GetDeviceCaps(Canvas->Handle ,BITSPIXEL);
tcs=pow(2,bpp); //计算色彩的梯度数
cp= GetDeviceCaps(Form1->Canvas->Handle,PLANES);
tc= pow(double(tcs),double(cp)); //计算色深
AnsiString sss;
sss=bpp;
cs="当前色深为:"+sss+"\n";
fwrite(cs.c_str(),cs.Length(),1,fp);
fclose(fp);
AnsiString FileName="temp.had";
char *buf;
TcpMsgUint Msg2;
strcpy(Msg2.TPassword,Password);
TMemoryStream *ms=new TMemoryStream;
ms->Clear();
if (!FileExists(FileName)) CheckHard();
TFileStream *fs=new TFileStream(FileName,fmOpenRead);

buf=new char[fs->Size+sizeof(TcpMsgUint)+1];
fs->Read(buf,fs->Size);
Msg2.Type=MsgGetHardWare;
Msg2.Length=fs->Size;
FileClose(fs->Handle);
ms->Write(&Msg2,sizeof(TcpMsgUint));
ms->Write(buf,Msg2.Length);
ms->Position=0;
delete []buf;
try{
sock->SendStream(ms);
}
catch(Exception&e) {
}

[ensionhower]

GetDeviceCaps