void WINAPI entrypoint (void)

[donvigor]

so let assume one does not need all the parameters provided by WinMain,
how can one have the entry point to be

win WINAPI entrypoint(void) ...???

[E0p9LyTq]

The Win API has the WinMain function defined a certain way, with four parameters, no more no less.

If you don't want to use a particular parameter then use the UNREFERENCED_PARAMETER macro on the parameter. With Win32 apps the "HINSTANCE hPrevInstance" parameter is always ignored, it is an artifact of Win16.

#define UNICODE
#define _UNICODE

#include <windows.h>

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR szCmdLine, int iCmdShow)
{
   UNREFERENCED_PARAMETER(hInstance)
   UNREFERENCED_PARAMETER(hPrevInstance)
   UNREFERENCED_PARAMETER(szCmdLine)
   UNREFERENCED_PARAMETER(iCmdShow)

   MessageBoxW(NULL, L"Hello, Windows 10!", L"HelloMsg", MB_OK);

   return 0;
}

If you are compiling your source as a .cpp file you can use
int WINAPI WinMain(HINSTANCE /*hInstance*/, HINSTANCE /*hPrevInstance*/, LPSTR /*szCmdLine*/, int /*iCmdShow*/)
or
int WINAPI WinMain(HINSTANCE, HINSTANCE, LPSTR, int)

You can create a Windows app with using the WinMain parameters:

#include <windows.h>

int main()
{
   MessageBoxW(NULL, L"Hello, Windows 10!", L"HelloMsg", MB_OK);

   return 0;
}

[donvigor]

thanks FurryGuy

You can create a Windows app with using the WinMain parameters:

you meant "You can create a Windows app "without" using the WinMain parameters?

so if I understood well..in the last code box,
you're saying that by including <windows.h>
I can have a custom entry point???

[modoran]

You can have a custom entry point, but then you need to not use any C library functions at all. It's not worth the trouble unless you want a very compact executable.