Check edit text for a symbol

Hello there,
I'm making a GUI for Compressible flow calculations in which i have 33 edit texts for all my variables. All the values pass through the algorithm and solve for each others (using knowns to get Unknowns). I want the user to be able to specify a certain unknown by typing "?" in editbox for which I can know that he only needs this value and represent it in a message box. How can I do the edit box check for "?" symbol in this case?

Answer 1

[Adam Danz]

The "String" property of your editbox contains the content of the text. You can use strcmpi() to determine whether the text box contains a "?" or not. The solution below also uses strtrim() to get rid of any unintended empty spaces.

isUnknown = strcmpi(strtrim(handles.Textbox1.String),'?'); 

Where handles.Textbox1.String is the handle to your editbox.

isUnknown will be a logical true/false.