wip opengl demo in temp lang

(impfunc GetModuleHandleA
    (conv stdcall)
    (ret intptr)
    (arg intptr)
)

(class WNDCLASS
    (var style u32)             // UINT
    (var lpfnWndProc intptr)    // WNDPROC
    (var cbClsExtra i32)        // INT
    (var cbWndExtra i32)        // INT
    (var hInstance intptr)      // HINSTANCE
    (var hIcon intptr)          // HICON
    (var hCursor intptr)        // HCURSOR
    (var hbrBackground intptr)  // HBRUSH
    (var lpszMenuName intptr)   // LPCTSTR
    (var lpszClassName intptr)  // LPCTSTR
)

(impfunc DefWindowProcA
    (conv stdcall)
    (ret intptr) // LRESULT
    (arg intptr) // HWND
    (arg u32)    // UINT msg
    (arg intptr) // WPARAM
    (arg intptr) // LPARAM
)

(func WndProc
    (conv stdcall)
    (ret intptr)        // LRESULT
    (arg intptr hwnd)   // HWND
    (arg u32    uMsg)   // UINT msg
    (arg intptr wParam) // WPARAM
    (arg intptr lParam) // LPARAM
    (body
        (return (call DefWindowProcA hwnd uMsg wParam lParam))
    )
)

(class OpenGLWindow
    (var hInstance intptr (call GetModuleHandleA null))
    (func __construct (body
        (var wc (call WNDCLASS))
        (set (getprop wc style) 0x23)             /* CS_HREDRAW | CS_VREDRAW | CS_OWNDC */
        (set (getprop wc lpfnWndProc) WndProc)
        (set (getprop wc hInstance) hInstance)
        /*
        wc.hIcon            = LoadIcon(NULL, IDI_WINLOGO);          // Load The Default Icon
        wc.hCursor          = LoadCursor(NULL, IDC_ARROW);          // Load The Arrow Pointer
        */
        (set (getprop wc lpszClassName) (getprop "OpenGL Test" cStringPtr))
    ))
)

(func main
    (ret void)
    (body
        (var window (call OpenGLWindow))
    )
)