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getch

hi i want to get number from operator, in c language we use scanf, what is the similar code here?? and i want to create box like this whit label and button, what is the code?? thanks for helping

enter code

hi 1- i need to enter some number in mt4 so that i need to get number or in c++ cin, how i write this code in meta editor ?? 2- in need to get free margin number and put it in int variable(like int A; A= get(free margin)) how i can do it?? what is a code