数组出现乱码，mciSendString 不能暂停

[库伯]

#include "stdafx.h"
#include <windows.h>
#include <windowsx.h>

#include <commdlg.h>
#include <mmsystem.h>

#include "resource.h"
#include "MainDlg.h"

BOOL WINAPI Main_Proc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    switch(uMsg)
    {
        HANDLE_MSG(hWnd, WM_INITDIALOG, Main_OnInitDialog);
        HANDLE_MSG(hWnd, WM_COMMAND, Main_OnCommand);
		HANDLE_MSG(hWnd,WM_CLOSE, Main_OnClose);
    }

    return FALSE;
}

BOOL Main_OnInitDialog(HWND hwnd, HWND hwndFocus, LPARAM lParam)
{
    return TRUE;
}

void Main_OnCommand(HWND hwnd, int id, HWND hwndCtl, UINT codeNotify)
{
	OPENFILENAME ofn;
	TCHAR szFile[256];
	ZeroMemory(&ofn,sizeof(ofn));
	ofn.lStructSize=sizeof(ofn);
	ofn.lpstrFile=szFile;
	ofn.lpstrFile[0]=TEXT('\0');
	ofn.nMaxFile=sizeof(szFile);
	ofn.lpstrFilter=TEXT("ALL\0*.*\0MP3\0*.MP3\0");
	ofn.nFilterIndex=2;
	ofn.lpstrFileTitle=NULL;
	ofn.nMaxFileTitle=0;
	ofn.lpstrInitialDir=NULL;
	ofn.Flags=OFN_EXPLORER|OFN_PATHMUSTEXIST|OFN_FILEMUSTEXIST;

    switch(id)
    {
	    case IDC_OPEN:
		{            
			if(GetOpenFileName(&ofn))
			{
			    //MessageBox(hwnd,szFile,TEXT("123"),MB_OK);
				TCHAR shortPath[256];
				GetShortPathName(szFile,shortPath,sizeof(shortPath));
				TCHAR temp[300];
				wsprintf(temp,"play %s",shortPath);
				mciSendString(temp,NULL,0,NULL);
			}
		}
        break;
		case IDC_PAUSE:
		{
		   TCHAR temp_p[300];
		   TCHAR shortPath[256];
		   GetShortPathName(szFile,shortPath,sizeof(shortPath));
		   wsprintf(temp_p,"pause %s",shortPath);
           mciSendString (temp_p, "",0,NULL);  		
		}
		break;
        default:
		break;
    }
}

void Main_OnClose(HWND hwnd)
{
    EndDialog(hwnd, 0);
}

一个简单的mp3播放器，暂停按钮不是实现暂停，调试发现：在Main_OnCommand定义的数组变量TCHAR szFile[256];在执行完case IDC_OPEN:的时候是正常的值。执行完case IDC_PAUSE:的时候就变成乱码，导致case IDC_PAUSE:shortPath,和temp_p都为乱码！希望高人指点！