//////edit: oct 22 solved. was making it lots harder than needed;
easier to call the textbox in each case. [returns are weeeeird]
don't know if that's a good explanation, but variables
pass through correctly and the whole program works now. thanks all ^______________^////

Hello I'm trying to write a program where the user enters a number in a message box, and values are calculated
through a function.
What I can't figure out is how to pass that calculated number [suppose it's a variable called quantity] to
a text box.
I do something like
quantity = (txtShipment.Text)

and get Message="Conversion from string "" to type 'Double' is not valid."

quantity is declared as a double, but I can't seem to figure this out. :/


Is there a way to go about this? Thank you muchly

edit::
after some editing, I now get a 0 in the textbox.
How can the variable pass through the function and display in a textbox?
It's going byref in the input data sub, and is byref in the function where the calculations are done.
Thanks in advance ^^;

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