Exercise: Check a user has made sensible dating choices

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Category ==> Visual Basic 2010  (42 exercises)
Topic ==> Testing conditions  (2 exercises)
Level ==> Relatively easy
Course ==> Introduction to VB.NET
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Press CTRL + D to add the file called frmPreferences.vb from the above folder into your project (or right click on the project and choose to add it as an existing item). 

Change your project's properties to make this the default form for your project.  When you run your project, you should see this:

Dating agency form

Write code for the OK button to display error messages if you leave either combo box blank:

Dating form left blank message Message if person not filled in
If the first one is blank ... If the second one is blank ...

You can check the length of the text property of a combo box to see if it's blank.  If both combo boxes are filled in, show the user the choices they've made:

Confirmation message

That's it! 

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