calling convention callback

VC involves the concept of calling convention, especially the callback function Callback,winapi and so on. These are all attributed to the calling convention, the VC is used by default in the Cdecl C language calling convention, and Callback,winapi is stdcall that is the Pascal calling convention. These two conventions have some differences in defining the order in which parameters are passed and the stack being clear.        Delphi is also a Pascal convention, so the function of Delphi encapsulated in the VC call when it is best to specify its contract is stdcall, otherwise easy to cause the program crashes. Also, you can set the contract in the IDE to use the default stdcall or cdecl.

calling convention callback