Hello,
Hope you are doing well !
I have worked on many project related to make a separate GUI application to communicate with the MT4, it can use any of the messaging technique between the GUI application and the MT4.
For me it was always C# I use to create the GUI, I can send you some examples, but I think I need you to reply firstly in order to be able to communicate with you in a messaging mode so I be able to attach my files "right now I can not attach any as it not allow me to do it cause it say this is only for bid proposal :)"
I have a question, do you have your own GUI and you want to make it communicate with the MT4? you you need your GUI to be built from the scratch "I prefer the last".
Let me know, Thanks.
Best regards.
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Jack.