WinAPI的CreateWindow 如何指定任务栏图标

我现在画了一个窗体,但是奇怪的是任务栏的图标并没有显示成默认的图标,而是如下图:
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下面是我的全部代码,请问有啥问题:

    #include <windows.h>    #include <stdlib.h>    #include <string.h>    #include <tchar.h>    #include <stdio.h>    #include <GL/GL.h>    #pragma comment (lib,"kernel32.lib")    #pragma comment (lib,"user32.lib")    #pragma comment (lib,"opengl32.lib")    #pragma comment (lib,"Gdi32.lib")    LRESULT CALLBACK WndProc(HWND hWnd,UINT msg,WPARAM wPara,LPARAM lPara);    int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)    {        MSG msg         = {0};        WNDCLASSEX wc   = {0};        wc.cbSize       = sizeof(WNDCLASSEX);        wc.lpfnWndProc  = WndProc;        wc.hInstance    = GetModuleHandle(NULL);        wc.hbrBackground = (HBRUSH)(COLOR_BACKGROUND);        wc.lpszClassName = "Hello,world";        wc.style = CS_OWNDC;        wc.hCursor      = LoadCursor(NULL,IDC_ARROW);        wc.hIcon        = LoadIconW(wc.hInstance,MAKEINTRESOURCEW(IDI_APPLICATION));        wc.hIconSm      = LoadIconW(wc.hInstance,MAKEINTRESOURCEW(IDI_APPLICATION));        if(!RegisterClassEx(&wc))            return 1;        CreateWindowW(L"Hello,World",L"Hello,World",WS_OVERLAPPEDWINDOW|WS_VISIBLE,0,0,640,480,0,0,hInstance,0);        while(GetMessage(&msg,NULL,0,0) > 0)            DispatchMessage(&msg);        return 0;    }    LRESULT CALLBACK WndProc(HWND hWnd,UINT msg,WPARAM wPara,LPARAM lPara)    {        switch(msg)        {            case WM_CREATE:                {                    PIXELFORMATDESCRIPTOR pfd =                    {                        sizeof(PIXELFORMATDESCRIPTOR),                        1,                        PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER,                        PFD_TYPE_RGBA,                        32,                        0,0,0,0,0,0,                        0,                        0,                        0,                        0,0,0,0,                        24,                        8,                        0,                        PFD_MAIN_PLANE,                        0,                        0,0,0                    };                    HDC ourWindowHandleToDeviceContext = GetDC(hWnd);                    int letWindowChooseThisPixelFormat = ChoosePixelFormat(ourWindowHandleToDeviceContext,&pfd);                    SetPixelFormat(ourWindowHandleToDeviceContext,letWindowChooseThisPixelFormat,&pfd);                    HGLRC ourOpenGLRenderingContext = wglCreateContext(ourWindowHandleToDeviceContext);                    wglMakeCurrent(ourWindowHandleToDeviceContext,ourOpenGLRenderingContext);                    // printf("opengl version: %s\n",glGetString(GL_VERSION));                    // MessageBoxA(0,(char*)glGetString(GL_VERSION),"OPENGL VERSION",0);                }                break;            case WM_DESTROY:                PostQuitMessage(0);                break;            default:                return DefWindowProc(hWnd,msg,wPara,lPara);                break;        }        return 0;    }