Convert Delphi interface to COM interface

Source: Internet
Author: User
Delphi is compatible with the Data Types of COM. Otherwise, it is not true.

Here is a simple example:

// Delphi
Procedure tyn. save2 (data: olevariant; out errcount: integer );
Dspunit. applyupdates (data, 0, errcount );

// Com
Procedure tyn. Save (data: olevariant; out errcount: sysint );
Save2 (data, errcount );

Value of this example:
If you port the previous two layers to multiple layers, you can retain the original service class.
However, there is no doubt that data types need to be converted.

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