Registering button Click on Non-Modal Userform to continue with code

Hi,

I am attempting to fill in an online form in internet explorer, my code fills in the blank input text boxes on the form and then I would like a userform ('DWGRegCheck_Submit') to appear prompting the user to select options from the dropdown menu (hence the userform is non-modal) as it has proven too much of a hassle to achieve this through code. Once selecting the options the user should then be able to click a CommandButton (named 'DWGSubmit_Button') on the userform, and the code will continue and click 'submit' on the webpage etc. etc.

Heres my attempt so far:

IN DWGRegCheck_Submit (Code):

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IN Module 1:

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The problem I have is when I run the code excel crashes on the Do loop (However it cycles through when pressing F8)

The 'DWGSubmit_Button' and 'Cancel_Button' do not seem to fire properly as I have left a breakpoint on the lines 'DWGSubClick = True' and 'CancelClick = True' and the code does not pause there

That is my question, how do you code a button on a form that 'continues' with the code?

I should also note that there is a for loop in the code as is show below, so the procedure is repeated several times.

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