You kind of can, that is one of their design points, naturally you need to move the context into the body and know what to cast back from.

I guess I need to prove a point on my Github during next week.

▲

LegionMammal978 a day ago | parent | next [-]

If you mean that you can call a C++ lambda from a static C callback via a context pointer, of course you can do that, it's not very mind-boggling. Rust FFI libraries similarly have to do that trick all the time to turn a closure into a C callback. The primary problem with WNDPROC is how to get that context pointer in the first place, which is the part that OP and everyone in the comments are talking about.

▲

rovingeye a day ago | parent | prev [-]

I assume by "move the context into the body" you mean using GetWindowLongPtr? Why not just use a static wndproc at that point?

▲

pjmlp a day ago | parent [-]

I mean using a static C++ lambda that moves the context into the lambda body via capture specifier.

C++ lambdas are basically old style C++ functors that are compiled generated, with the calling address being the operator().

	▲	rovingeye a day ago \| parent [-]
		That doesn't sound like a valid wndproc