Nonvisual extension example

To illustrate the principles involved in building and using an extension, this chapter starts with a sample application that uses a PowerBuilder extension to perform a simple arithmetic operation. Ordinarily, this is not a task that needs PBNI, but it is used here to make the basic process clear. The rest of this chapter describes building extensions in more detail.

PBX file suffix

PowerBuilder extensions are DLL files but typically use the file extension .pbx instead of .dll. Your extension is compiled into a PBX file by default if you use the wizard described in Appendix A, "Using the Visual Studio Wizards"

For more realistic examples, see the PowerBuilder CodeXchange Web site .

The following sample application has two main steps:

• Building the pbadd PowerBuilder extension

• Using the extension in PowerBuilder