How can I change a Windows .exe to something that is compatible?

[0821]

The Title says it all. I have followed the instructions from this site http://www.myabandonware.com/howto/, but then I get this notification that the program file is a Windows executable, and one that does not work on DOSbox. How do I get it to one that is compatible?

please help!

[The Fifth Horseman]

You don't.
The only way to run Windows programs in DOSBox is to run Windows itself inside DOSBox and then the programs in there.

[Smiling Spectre]

Oh, relating, but totally different question, 5th.

Is it possible to transform Win16 format to Win32, without decompiling? I have a very little knowledge about difference between it, so I have no idea, if it even theoretically possible... :)

[Japo]

Nope

[The Fifth Horseman]

Oh, relating, but totally different question, 5th.

Is it possible to transform Win16 format to Win32, without decompiling? I have a very little knowledge about difference between it, so I have no idea, if it even theoretically possible... :)
No. Completely different APIs.

[Smiling Spectre]

Tsk. Pity. I had slight hope that I can start all this Win16 games in my brand new Win8.1. Will not happen. Ok, thank you!