WPF Window control calls across a form / form method calls across a program

WPF Window control calls across a form / form method calls across a program

For example, the coexistence of the two procedures now Window, Form A and Form B, if I want to operate on Form A in the B form of it?

Operation 1: A calling method of func

Operation 2: A large call button, the large-button is unavailable

How to achieve it?

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I'll provide a solution, using the event

In IwndowB, the write event, the program used for func A call to achieve given below

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Binding in the event of B in A

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B events were defined in A, gave a func method, so that the background of the large button red discoloration, let's try to see results

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Click B operation in the form A, found in big red button programming A