>In the VB there are two more statements. I tried to run it a got "cannot find entry point OIAorder_status in the dll"

>>Public Declare Function OIAorder_status Lib _
>> "oi_api" _
>> Alias "#14" _
>> (ByVal hImgHdl As Long, _
>> ByVal OrderID As String, _
>> POrderStatusA As POrderStatus) _
>> As Long

Steven,

This function is imported in VB code by ordinal (#14), not by name. You need to use tool like "Depends" from Visual Studio in order to find an exported name of this function. If this function is exported only by ordinal (with no name), then you probably have not way to use this function in VFP directly.