illegal use of this type as an expression

学习MCI时看别人样例手敲代码出现的一个很经典的错误。

在C语言中定义的变量没有放在函数的开头。

#include <string.h>

#include <windows.h>

#include <Digitalv.h>

#include <mmsystem.h>

#pragma comment(lib, "winmm.lib")

int main()

{

	char buf[128];

	MCI_OPEN_PARMS mciOpen;

	MCIERROR mciError;

	UINT DeviceID;

	MCI_PLAY_PARMS mciPlay;

	mciOpen.lpstrDeviceType = L"mpegvideo";

	mciOpen.lpstrElementName = L"year.mp3";

	mciError = mciSendCommand(0, MCI_OPEN,MCI_OPEN_TYPE | MCI_OPEN_ELEMENT, (DWORD)&mciOpen);

	if(mciError)

	{

		mciGetErrorString(mciError, (LPWSTR)buf, 128);

		MessageBox(NULL, TEXT("send MCI_OPEN command failed"), TEXT("ERROR"), 0);

		return;

	}

	DeviceID = mciOpen.wDeviceID;

	mciError = mciSendCommand(DeviceID, MCI_PLAY, MCI_WAIT | MCI_DGV_PLAY_REPEAT, (DWORD)&mciPlay);

	if(mciError)

	{

		mciGetErrorString(mciError, (LPWSTR)buf, 128);

		MessageBox(NULL, TEXT("send MCI_PLAY command failed"), TEXT("ERROR"), 0);

		return;

	}

	return 0;

}

巴特西

illegal use of this type as an expression

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