public string filter(int index)
{
IntPtr pStr = xlFilterColumnFilter(handle, index);
if (pStr == (IntPtr)0)
{
throw new Exception(book.errorMessage());
}
String s = Marshal.PtrToStringAuto(pStr);
return(s);
}
public string readStr(int row, int col)
{
IntPtr formatHandle = (IntPtr)0;
string s = xlSheetReadStr(handle, row, col, ref formatHandle);
if (s == null)
{
throw new Exception(book.errorMessage());
}
return(s);
}