Thread: openfile error

When I compile this code with BC 4.5 compiler and click Cancel the program closes with an error. This seems to be cause from this line:
ofn.lpstrFilter = "Wav Files (*.wav)\0*.wav\0All Files (*.*)\0*.*\0";

Why would that line cause an error?

Code:

void getFile(void)
{
	OPENFILENAME ofn;
	char szFileName[MAX_PATH] = "";
	ZeroMemory(&ofn, sizeof(ofn));
	ofn.lStructSize =  sizeof(ofn);
 //	ofn.hwndOwner =	 hwnd;
//	ofn.lpstrFilter = "Text Files (*.txt)\0*.txt\0All Files\0*.*\0";
	ofn.lpstrFilter = "Wav Files (*.wav)\0*.wav\0All Files (*.*)\0*.*\0";
	ofn.lpstrFile = szFileName;
	ofn.nMaxFile = MAX_PATH;
	ofn.Flags = OFN_FILEMUSTEXIST | OFN_HIDEREADONLY;
  //	ofn.lpstrDefExt = "txt";
	ofn.lpstrDefExt = "wav";

	if(GetOpenFileName(&ofn))
	{
 //		readFile(szFileName);
	  SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),FGBLACK | BGWHITE);
	  printf("Playing: ");
	  SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),FGRED);
	  printf(" %s", szFileName);
	  sndPlaySound(szFileName,SND_ASYNC);
	}
}