How determine whether form is open? (1 Viewer)

[Randix]

If a particular form is open, I want to do certain things. How do I determine if a particular form is open or not using code?

 

[Rich]

Look for the IsLoaded function in many of the samples supplied by Microsoft including Northwind, since the same question was answered only a matter of days ago you could have found the answer by using the search button provided.