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In a dialog, i have added picture control from resource. in this i am displaying an image accordingly at the runtime which is working fine.
I need to zoom in / zoom out the displayed image according to mouse wheel move. I thought of adding window procedure to that picture control, so that i can handle mouse command over there. in MFC, i can see options and examples, but in win32 api, i dont know how to do that.
Just derive your own class from the CStatic (picture control is a static control), create the control member variable in the dialog for this picture control, and handle any Windows message you need in this derived class.
What is a common way to use NASM (or other assembly compilers) when developing windows applications. Do you integrate it with VisualStudio shell or you go down the path of always using the command line?
The usual way to integrate assembly files into a C++ project is to add the MASM "build customization" (right click a project, go to Build Dependencies > Build Customizations, check the box in front of MASM). Then you can include .asm files as normal sources without needing to do anything weird. You can install vsyasm and use YASM that way, if you prefer a more NASM-y syntax. Using NASM itself is possible, but as far as I know there's no nice integration like that, you can set it up manually as a custom build tool.