Ivalid conversion from 'LRESULT' to 'WNDPROC'

#include <windows.h>
 
LRESULT WINAPI WndProc(HWND, UINT, LPARAM, WPARAM);
 
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
    HWND hWnd;
    MSG msg;
    WNDCLASS w;
    memset(&w, 0, sizeof(WNDCLASS));
    w.style = CS_HREDRAW | CS_VREDRAW;
    w.lpfnWndProc = WndProc;
    w.hInstance = hInstance;
    w.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
    w.lpszClassName = "My Class";
    RegisterClass(&w);
    hWnd = CreateWindow("My Class", "My Title", WS_OVERLAPPEDWINDOW, 584, 284, 200, 200, NULL, NULL, hInstance, NULL);
    ShowWindow(hWnd, nCmdShow);
    UpdateWindow(hWnd);
    while (GetMessage(&msg, NULL, NULL, NULL))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    
    return msg.wParam;
}
 
LRESULT WINAPI WndProc(HWND hWnd, UINT Message, WPARAM wparam, LPARAM lparam)
{
    switch (Message)
    {
        case WM_DESTROY: PostQuitMessage(0); break;
        default: return DefWindowProc(hWnd, Message, wparam, lparam);
    }
    return 0;
}