说明：  Windows编程基础--窗体篇 　　现在Windows已经成为世界上使用最广泛的操作系统，这使得学习Windows编程变得十分重要．和学习其他 编程语言一样，我们也从一个最简单的例子开始学习Windows编程．这个例子将建立一个Windows窗体并在窗体中间显示"HELLO"字符串（见图１）． 　　 　　１．程序的开始和结束 和C语言中的main()函数一样，Windows程序是从WinMain()函数开始和结束的．WinMain()函数是在WINBASE.H中定义的，其原形如下： 　 　int WINAPI WinMain( HINSTANCE hInstance， HINSTANCE hPrevInstance， LPSTR lpCmdLine， int nShowCmd ) 其中第一个参数(HINSTANCE hInstance)是程序的实例句柄，这个实例句柄是程序的唯一标识．第二个参数（HINSTANCE hPrevInstance)是用做检查是否有多个程序实例运行，但由于Windows9X和NT（包括更高版本）是32位操作系统，所以这个参数总是NULL．第三个参数（LPSTR lpCmdLine）是一个指向字符串的指针，用来保存运行程序时的命令行参数．第四个参数（int nShowCmd）用来指?
(Windows based programming-- Windows Forms chapter now has become the world's most widely used operating system, which makes learning Windows programming has become very important. , And other programming languages, we are also a very simple example start learning Windows programming. This example will establish a WinForms and intermediate forms show "Hello" string (see figure 1). 1. The process begins and ends and the C language main () function, Windows programs from WinMain () function beginning and ending. WinMain () function is defined in WINBASE.H, its prototype is as follows : int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd), the first of which parameters (HINSTANCE hInstance) are examples of procedures handle, the handle)