Hello Lynn,
when you are developing you will find in the project folder, a bin folder
under it debug folder where you can find there exe of your developed application.
copy your abc.exe to there
in the code running abc.exe, you supposed to defining the path of abc.exe
define it like that
Application.StartupPath + "abc.exe"
then test it if it is fine you can start packaging
check this link for deploying windows application
http://msdn.microsoft.com/library/d.../vbtskcreatinginstallerforyourapplication.asp
notice this steps in the article
To add the Windows application to the installer
Select the My Notepad Installer project in Solution Explorer. In the File
System Editor, select the Application Folder node.
On the Action menu, choose Add, Project Output.
In the Add Project Output Group dialog box, choose My Notepad from the Project
drop-down list. Click OK to close the dialog box.
Select the Primary Output group from the list, then click OK.
On the Build menu, choose Build My Notepad Installer.
after these steps right click on teh right pane in the file system editor
and click add->File then browse your abc.exe.
then build your application and you will have a successfull setup file
Ciao
Marwan Tarek
http://www.sharepointblogs.com/marwantarek/