Microsoft Visual Foxpro 90iso
Visual FoxPro 6 was a part of Visual Studio 6 so if you find VS6 for sale then you could be happy. Of course, Visual Studio 6 is not available but you may look e.g.
You should also install SP 5 for VS6 as this SP contains the latest VFP 6 version. The SP5 is also not easy to find. MSDN mentioned above still contains VFP 7, 8, and 9. It seems to be the safest option for about $1200. Certain source code changes will be necessary.

Do you have the source? The application should run on the new PC without changes. Amati kraslice clarinet serial number.
It will just require run-time libraries which you can copy from the old PC. Look for files vfp6r.dll and vfp6renu.dll. Additional necessary files are Msvcrt.dll and msvcr6.dll probably. They are in Windows System32 folder. Even VFP6 itself (or any VFP version) needs more than copying it over.
There is a call to VFP6.EXE /regserver registering several things and also the Ocontrols used in solution.app need to register. The VFP install also installs into MS Shared folder and system folder. Especially if you skip several OS versions several things are not part of the OS anymore and have to be moved, too. Then several settings need to be done, eg location of files adjusted in Options.
But to move a VFP app you don't move the VFP6 installation, you move the app and runtimes and controls and you need to register controls and either register runteims or put them to the EXE, if they had been separate. Also come here with error messages, there are several, missing runtimes causes some, missing a control others.
Litesoftcharge.bitballoon.com at KeyOptimize. Litesoftcharge.bitballoon.com overview. Create Widget Add check.
But that can all be fixed, when you deep dive into it.