要求用户正确输入用户名和密码，然后才能进入系统。刚好前几天有个人问俺如何在程序启动时先启动登录对话框的问题，俺就给他写了个示例程序，今天拿出来给大伙共享，有什么...

this a ocx ,please use-this a ocx, please use

问题的提出:我们在编制程序时,经常要用到清屏处理,如dos下的cls,Turbo C下的clrscr()等都具有清屏功能,但这些均为一般意义的清屏, 并未显示其清屏规律.而有时为了达到清屏的艺术美观,往往对清屏有一些具体要求,如:开幕清屏 闭幕清屏 上清屏 下清屏 中清屏.为此,这里 用C语言编制了几个子函数,用于程序中时,既可达到清屏的目的,有能增加屏幕的艺术美观. 子函数及演示程序:-the problem : we in the preparation of procedures, regular use of the screen, such as the dos cls, Turbo C under the clrscr () so with the screen, but these are general sense of the screen does not show the screen law. And sometimes in order to achieve the screen beauty of art often on the screen that there are some specific requirements, such as : opening screen closing supernatant Ping-ping-ping under which the screen. To that end, here with C language several Functions for the procedure, can achieve the purpose of the screen, the screen will increase the artistic aesthetic. Functions and Demonstration Program :

一个与OutLook左侧窗口一样的控件，可以加入图标，可以进行相关操作。-a patch with the same left side window controls, can join icon that can be related operations.

非常实用的滚动字幕效果的窗口，实现文本类似电影字幕效果的功能，同时实现对单文档窗口的属性的修改。-Very practical effect of rolling subtitles window, realize the effect of text similar to the function of film subtitles, at the same time to realize the attributes of a single document window changes.

在对话框中添加菜单的源程序，希望对大家有所帮助-added in the dialog box menu source, we hope to help

实现了对话框窗口程序的模板，可以方便地添加功能。-Realize the dialog box window procedure of the template, you can easily add functionality.

对话框上画图的实现，效果比别的方法快，值得借鉴。非常好的实现方法，通过特殊的加载方法实现。-Dialog box on the drawing to achieve results faster than other methods, is worth learning from. Very good method, through special load method.

设置窗体颜色渐变，了解窗体颜色的设置。（基于对话框编程）-Setting form color gradient to understand the form the color settings. (Based on Dialog Programming)

本代码中实现的增强型文件对话框美观实用,可以替代CFileDialog！-the code to achieve enhanced dialog beautiful and practical, alternative CFileDialog!

不规则窗口实现代码。任意画的不规则对话框窗口，甚至有抠的圆孔。-Irregular code window. Arbitrary irregular painting dialog window, or even dig out the hole.