DEBUG模式与RELEASE模式

--------------------Configuration: dfse - Win32 Release--------------------

Linking...

gg.obj : error LNK2001: unresolved external symbol __imp__mciSendStringA@16

Release/dfse.exe : fatal error LNK1120: 1 unresolved externals

Error executing link.exe.



dfse.exe - 2 error(s), 0 warning(s)

#include<afx.h>

#include<stdio.h>

#include<mmsystem.h>





LRESULT CALLBACK MyProc(

  HWND hwnd,      // handle to window

  UINT uMsg,      // message identifier

  WPARAM wParam,  // first message parameter

  LPARAM lParam   // second message parameter

);







void ctrl_cdrom_door(

  LPCTSTR drivename ,//驱动器的名字如f:等.

  bool fOpen//弹出时用true,弹入时用false

)

{

TCHAR devstr[128],ctrlstr[128];

wsprintf(devstr,"open %s type cdaudio alias mycd wait",drivename);

wsprintf(ctrlstr,"set mycd door %s wait",fOpen?"open":"closed");

mciSendString(devstr,NULL,0,NULL);

mciSendString(ctrlstr,NULL,0,NULL);

mciSendString("close mycd wait",NULL,0,NULL);

}



int main()

{

	// TODO: Add your control notification handler code here

	int i,cdnum=0;

	char str[3];

	for(i=0;i<15;i++)

	{

		str[0]='A'+i;

		str[1]=':';

		str[2]='\0';

		if(DRIVE_CDROM==GetDriveType(str))

			cdnum++;

		if(cdnum==1)

		{

			ctrl_cdrom_door(str,true);		//打开光驱

			break;

		}

	}

	return 0;

}