基于 VB 的简单屏保程序实现
介绍了使用 Visual Basic (VB) 语言实现简单屏保程序的方法，并提供了核心代码示例。程序主要利用了 Windows API 函数，例如 BitBlt、GetDC、GetDesktopWindow 和 ReleaseDC，实现了屏幕图像的捕获和绘制，进而达到屏保效果。
Option Explicit
Dim screenhwnd, screendc, rc
Private Declare Function BitBlt Lib "gdi32" (ByVal hDestDC As Long, ByVal x As Long, ByVal y As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal hSrcDC As Long, ByVal xSrc As Long, ByVal ySrc As Long, ByVal dwRop As Long) As Long
'以下API函数可以通过VB自带的API文本浏览器复制而来。
Private Declare Function GetDC Lib "user32" (ByVal hwnd As Long) As Long
Private Declare Function GetDesktopWindow Lib "user32" () As Long
Private Declare Function ReleaseDC Lib "user32" (ByVal hwnd As Long, ByVal hdc As Long) As Long
开发者可以根据自身需求对代码进行扩展，例如添加动画效果、自定义图案等，以实现更加个性化的屏保程序。
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