窗口缩略图编程可以通过多种编程语言和API实现。以下是一些常见的方法和步骤：
使用Windows API
DwmRegisterThumbnail：用于创建窗口的缩略图。
DwmQueryThumbnailSourceSize：用于获取缩略图的尺寸。
DwmUpdateThumbnailProperties：用于更新缩略图的属性，如不透明度、尺寸等。
使用卓语言
卓语言提供了一些内置的函数和包，可以简化修改注册表的操作，从而关闭任务栏窗口预览功能。
使用PHP
PHP可以通过GD库的`imagegrabscreen`或`imagegrabwindow`函数截取屏幕或特定窗口的内容，并保存为图片。
使用易语言
易语言提供了与Windows API交互的函数，如`ThumbBarAddButtons`、`ThumbBarSetImageList`和`ThumbBarUpdateButtons`，用于在任务栏中添加和管理缩略图按钮。
示例代码（使用Windows API）
```csharp
using System;
using System.Runtime.InteropServices;
using System.Windows.Forms;
public class WindowThumbnail
{
[DllImport("dwmapi.dll")]
private static extern int DwmRegisterThumbnail(IntPtr hWnd, IntPtr hwnd, out IntPtr thumb);
[DllImport("dwmapi.dll")]
private static extern int DwmUpdateThumbnailProperties(IntPtr hThumb, ref DWM_THUMBNAIL_PROPERTIES props);
[StructLayout(LayoutKind.Sequential)]
private struct DWM_THUMBNAIL_PROPERTIES
{
public uint dwFlags;
public int fSourceClientAreaOnly;
public byte opacity;
public RECT rcDestination;
}
[StructLayout(LayoutKind.Sequential)]
private struct RECT
{
public int Left;
public int Top;
public int Right;
public int Bottom;
}
public static void CreateThumbnail(IntPtr hwnd)
{
IntPtr thumb;
if (DwmRegisterThumbnail(hwnd, IntPtr.Zero, out thumb) == 0)
{
DWM_THUMBNAIL_PROPERTIES props = new DWM_THUMBNAIL_PROPERTIES
{
dwFlags = (uint)DWM_TNP.DWM_TNP_RECTDESTINATION | (uint)DWM_TNP.DWM_TNP_VISIBLE | (uint)DWM_TNP.DWM_TNP_SOURCECLIENTAREAONLY,
fSourceClientAreaOnly = 0,
opacity = 255,
rcDestination = new RECT(0, 0, 100, 100)
};
DwmUpdateThumbnailProperties(thumb, ref props);
}
}
public static void UpdateThumbnail(IntPtr thumb)
{
DWM_THUMBNAIL_PROPERTIES props = new DWM_THUMBNAIL_PROPERTIES
{
dwFlags = (uint)DWM_TNP.DWM_TNP_RECTDESTINATION | (uint)DWM_TNP.DWM_TNP_VISIBLE | (uint)DWM_TNP.DWM_TNP_SOURCECLIENTAREAONLY,
fSourceClientAreaOnly = 0,
opacity = 255,
rcDestination = new RECT(0, 0, 100, 100)
};
DwmUpdateThumbnailProperties(thumb, ref props);
}
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Form form = new Form();
form.Handle = new IntPtr(0x123456); // 示例窗口句柄
CreateThumbnail(form.Handle);
Application.Run(form);
}
}
```
示例代码（使用卓语言）