请教各位大虾：
我刚刚学过Ｃ／Ｃ＋＋
现在学用ＶＣ＋＋
发现Ｗindowns　编程对ＶＣ＋＋很有帮助．所以现在也在学习．
等熟练掌握了以上２个方面的知识接下来打算做些实际性的东西，比如一些小工程项目的．
不知道大虾门有没更好的心得体会和建议，望不吝赐教，本人感激不尽～！

多写些代码

请高手帮忙看下,我利用教程中的程序编写要实现对光标与图标的调用,结果只出现Windows的一个框架而已
比如其中填充WNDCLASSEX 结构体内的相应域。使用API 函数LoadIcon( )和LoadCursor( )。
wcl.hIcon = LoadIcon(hThisInst,″MyIcon″);/*standard icon */
wcl.hIconSm = NULL;/*use small icon in MyIcon */
wcl.hCursor = LoadCursor(hThisInst,″MyCursor″);/*load cursor */
但并没有实现该结果.
另外:
HDC DC, memDC;
switch(message)
{
case WM_CREATE: /* load the bitmap */
hBit1 = LoadBitmap(hInst, "MyBP1"); /* load bitmap */
break;
case WM_LBUTTONDOWN:
DC = GetDC(hwnd); /* get device context */
memDC = CreateCompatibleDC(DC); /* create compatible DC */
SelectObject(memDC,hBit1);
BitBlt(DC,LOWORD(lParam),HIWORD(lParam),64,64,
memDC,0,0,SRCCOPY);/*display image */
ReleaseDC(hwnd,DC);/* free the device context */
DeleteDC(memDC);/* free the memory context */
break;
也并没有在我点击鼠标左键(WM_LBUTTONDOWN)的时候绘显示我的图片"MyBP1"
请问这是为什么啊?
恳盼哪位给以指点,不胜感激~~~~~~~

源程序:
#include <windows.h>
#include <string.h>
#include <stdio.h>

LRESULT CALLBACK WindowFunc(HWND, UINT, WPARAM, LPARAM);

char szWinName[ ] = "MyWin"; /* name of window class */
HBITMAP hBit1; /* handle of bitmap */
HINSTANCE hInst; /* handle to this instance */

int WINAPI WinMain(HINSTANCE hThisInst, HINSTANCE hPrevInst,
LPSTR lpszArgs, int nWinMode)
{
HWND hwnd;
MSG msg;
WNDCLASSEX wcl;

/* Define a window class. */
wcl.cbSize = sizeof(WNDCLASSEX);
wcl.hInstance = hThisInst; /* handle to this instance*/
wcl.lpszClassName = szWinName; /* window class name */
wcl.lpfnWndProc = WindowFunc; /* window function */
wcl.style = 0; /* default style */
wcl.hIcon = LoadIcon(NULL, IDI_APPLICATION); /* standard icon */
wcl.hIconSm = LoadIcon(NULL, IDI_WINLOGO); /* small icon */
wcl.hCursor = LoadCursor(NULL, IDC_ARROW); /* cursor style */
wcl.lpszMenuName = NULL; /* no menu */
wcl.cbClsExtra = 0; /* no extra */
wcl.cbWndExtra = 0; /* information needed */

/* Make the window white. */
wcl.hbrBackground = (HBRUSH) GetStockObject(WHITE_BRUSH);

/* Register the window class. */
if(!RegisterClassEx(&wcl)) return 0;
hInst = hThisInst; /* save instance handle */

/* Now that a window class has been registered, a window
can be created. */
hwnd = CreateWindow(
szWinName, /* name of window class */
"Custom Bitmap", /* title */
WS_OVERLAPPEDWINDOW, /* window style - normal */
CW_USEDEFAULT, /* X coordinate - let Windows decide */
CW_USEDEFAULT, /* Y coordinate - let Windows decide */
CW_USEDEFAULT, /* width - let Windows decide */
CW_USEDEFAULT, /* height - let Windows decide */
HWND_DESKTOP, /* no parent window */
NULL, /* no override of class menu */
hThisInst, /* handle of this instance of the program */
NULL /* no additional arguments */
);

/* Display the window. */
ShowWindow(hwnd, nWinMode);
UpdateWindow(hwnd);

/* Create the message loop. */
while(GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg); /* translate keyboard messages */
DispatchMessage(&msg); /* return control to Windows 98 */
}
return msg.wParam;
}

/* This function is called by Windows 98 and is passed
messages from the message queue.
*/
LRESULT CALLBACK WindowFunc(HWND hwnd, UINT message,
WPARAM wParam, LPARAM lParam)
{
HDC DC, memDC;
switch(message)
{
case WM_CREATE: /* load the bitmap */
hBit1 = LoadBitmap(hInst, "MyBP1"); /* load bitmap */
break;
case WM_LBUTTONDOWN:
DC = GetDC(hwnd); /* get device context */
memDC = CreateCompatibleDC(DC); /* create compatible DC */
SelectObject(memDC,hBit1);
BitBlt(DC,LOWORD(lParam),HIWORD(lParam),64,64,
memDC,0,0,SRCCOPY);/*display image */
ReleaseDC(hwnd,DC);/* free the device context */
DeleteDC(memDC);/* free the memory context */
break;
case WM_DESTROY:/*terminate the program */
DeleteObject(hBit1);/* remove the bitmap */
PostQuitMessage(0);
break;
default:
/* Let Windows 98 process any messages not specified in
the preceding switch statement. */
return DefWindowProc(hwnd,message,wParam,lParam);
}
return 0;
}

DC = GetDC(hwnd); /* get device context */
memDC = CreateCompatibleDC(DC); /* create compatible DC */
SelectObject(memDC,hBit1);
BitBlt(DC,LOWORD(lParam),HIWORD(lParam),64,64,
memDC,0,0,SRCCOPY);/*display image */
ReleaseDC(hwnd,DC);/* free the device context */
DeleteDC(memDC);/* free the memory context */
break;

这段代码什么也实现不了，就是一个空壳子，下面这句就根本没有对变量初始化。
BitBlt(DC,LOWORD(lParam),HIWORD(lParam),64,64,memDC,0,0,SRCCOPY);
Windows程序中有个最重要的概念就是ID，每一个控件实体都会有一个唯一的ID，包括窗口，按钮，图标，位图，菜单项等等，初始化比如鼠标的时候一个键的方法就是把资源文件倒入工程中去，然后给他分配一个ID，这时系统自动完成的，ID值其实就是一个宏定义。然后通过ID来初始化。比如 函数GetDialogItem(IDC_MAINWINDOW);就是取得窗口的函数，IDC_MAINWINDOW是一个宏定义，如果你的窗口的ID是IDC_MAINWINDOW，就可以获得它的窗口了。

LoadBitmap(hInst, "MyBP1") 也可以就写成LoadBitmap(IDB_BITMAP1);就可以将工程中的位图装入某个实体中了