c# - Adding Textbox and MessageBox to a class library -



c# - Adding Textbox and MessageBox to a class library -

i'm trying create dll existing project. existing project application calculates involvement rates , windows form.

the code i've been given create dll includes references textbox , messagebox.

here's sample method in code:

public static bool ispresent(textbox textbox) { if (textbox.text == "") { messagebox.show(textbox.tag + " required field.", title); textbox.focus(); homecoming false; } homecoming true; }

i've never created class library/dll before, followed the instructions here.

when build solution (for class library), error:

error 1 type or namespace name 'textbox' not found (are missing using directive or assembly reference?) j:\loanapplication\validatorsolution\validatorsolution\class1.cs 24 38 validatorsolution

and it; understand error saying. problem don't know how around it.

any advice?

you need reference system.windows.forms(use this guide) , include using statement

using system.windows.forms;

for each external type you're using in library, need help vs determine , 1 mean.

c# visual-studio-2010

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