WS_EX_LAYERED属性添加后出现的问题。（两天内必定结贴）

#include <windows.h>

#include <stdio.h>

#include<string>

#include <time.h>

using namespace std;

#define WS_EX_LAYERED 0x80000

typedef BOOL (WINAPI*FPT)(HWND,int,BOOL,DWORD);

FPT fp;

LRESULT CALLBACK WinSunProc(

  HWND hwnd,      // handle to window

  UINT uMsg,      // message identifier

  WPARAM wParam,  // first message parameter

  LPARAM lParam   // second message parameter

);



int WINAPI WinMain(

  HINSTANCE hInstance,      // handle to current instance

  HINSTANCE hPrevInstance,  // handle to previous instance

  LPSTR lpCmdLine,          // command line

  int nCmdShow              // show state

)

{

	WNDCLASS wndcls;

	wndcls.cbClsExtra=0;

	wndcls.cbWndExtra=0;

	wndcls.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);

	wndcls.hCursor=LoadCursor(NULL,IDC_CROSS);

	wndcls.hIcon=LoadIcon(NULL,IDI_ERROR);

	wndcls.hInstance=hInstance;

	wndcls.lpfnWndProc=WinSunProc;

	wndcls.lpszClassName="Weixin2003";

	wndcls.lpszMenuName=NULL;

	wndcls.style=CS_HREDRAW | CS_VREDRAW;

	RegisterClass(&wndcls);



	HWND hwnd;

	hwnd=CreateWindowEx(WS_EX_TOPMOST|WS_EX_LAYERED|WS_EX_TOOLWINDOW,"WinSunProc",NULL,WS_POPUP|WS_SYSMENU,

		0,0,GetSystemMetrics(SM_CXSCREEN),GetSystemMetrics(SM_CYSCREEN),NULL,NULL,hInstance,NULL);



	ShowWindow(hwnd,SW_SHOWNORMAL);

	UpdateWindow(hwnd);



	MSG msg;

	while(GetMessage(&msg,NULL,0,0))

	{

		TranslateMessage(&msg);

		DispatchMessage(&msg);

	}

	return 0;

}



LRESULT CALLBACK WinSunProc(

  HWND hwnd,      // handle to window

  UINT uMsg,      // message identifier

  WPARAM wParam,  // first message parameter

  LPARAM lParam   // second message parameter

)

{

	HMODULE hsad=LoadLibrary("user32.dll");

	HDC hdc;

	char str[]="I love You";

	switch(uMsg)

	{

	case WM_CREATE:

	

		fp=(FPT)GetProcAddress(hsad,"SetLayeredWindowAttributes");	

		FreeLibrary(hsad);

		fp(hwnd,RGB(255,255,255),200,3);

		MessageBox(hwnd,"","",MB_OK);

		SetTimer(hwnd,1,1000,NULL);

		break;

	case WM_TIMER:

		

		hdc = GetDC(hwnd);

		TextOut(hdc,rand()%SM_CXSCREEN,rand()%SM_CYSCREEN,str,sizeof(str)-1);

		break;

	

	case WM_CHAR:

		char szChar[20];

		sprintf(szChar,"char is %d",wParam);

		MessageBox(hwnd,szChar,"weixin",0);

		break;

	case WM_LBUTTONDOWN:

		HDC hdc;

		hdc=GetDC(hwnd);

		TextOut(hdc,0,50,"计算机编程语言培训",strlen("计算机编程语言培训"));

		ReleaseDC(hwnd,hdc);

		break;

	case WM_PAINT:

		HDC hDC;

		PAINTSTRUCT ps;

		hDC=BeginPaint(hwnd,&ps);

		TextOut(hDC,0,0,"维新培训",strlen("维新培训"));

		EndPaint(hwnd,&ps);

		break;

	case WM_CLOSE:

		if(IDYES==MessageBox(hwnd,"是否真的结束？","weixin",MB_YESNO))

		{

			DestroyWindow(hwnd);

		}

		break;

	case WM_DESTROY:

		PostQuitMessage(0);

		break;

	default:

		return DefWindowProc(hwnd,uMsg,wParam,lParam);

	}

	return 0;

}

程序希望的功能，在屏幕的桌面上每隔一秒中随机在某处打印 I love you。
我在createWindowEx中添加了 新的属性WS_EX_LAYERED，使得窗口透明，然而这样就出现了问题。调试结果的问题如下，
窗口并不出现，消息循环中如果使用了GetMessage（），那么将永远不返回，使得消息循环停滞，如果使用peekMessage 则反回0，使得程序直接退出了。 请问我该如果跟改，才能让程序响应WM_CREATE 消息。