hello guys i make a simple calculator in window form application and i want to add it with a scientific calculator form how can i connect these two forms

If you are using Visual Studio, in solution explorer window, right click your solution,-->Add-->New Item-->Windows Form.
Call this from your button click handler.

thankx alot #ddanbe

i made another form but i need your help @ ddanbe to connect second form. how to make a handle that when i click scintific button on form 1 it goes to second form

on't know exactly what you mean by "goes to second form"
Perhaps this video may give you some further ideas.

i mean when i click on the button on form1 it goes to second form

got it thankx again @ ddanbe

will your calculator be able to convert Dec <-> Binary <-> Hex <-> Oct ?
How many decimal places will it print 22/7 or pi?

its not a convertor

double pi=3.14159265;

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