How MFC achieved by the mouse wheel picture zoom in on picture controls, like with the picture viewe-CodePudding

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How MFC achieved by the mouse wheel picture zoom in on picture controls, like with the picture viewe

Time：10-06

Consult, could you tell me how the MFC mouse wheel to achieve image zoom in on picture controls, like we use image viewer scroll wheel optional zoom in, had better have the implementation code, thank you

CodePudding user response:

Response WM_MOUSEHWHEEL roller

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