历史评论归档

百度找的不知道行不行 看不懂

获得窗体的句柄可以用GetWindow方法获得窗体标题用GetWindowText方法，显示隐藏某个窗体用ShowWindow方法，给你举个例子

using System.Runtime.InteropServices;

private const int WS_VISIBLE = 268435456;//窗体可见
private const int WS_MINIMIZEBOX = 131072;//有最小化按钮
private const int WS_MAXIMIZEBOX = 65536;//有最大化按钮
private const int WS_BORDER = 8388608;//窗体有边框
private const int GWL_STYLE = (-16);//窗体样式
private const int GW_HWNDFIRST = 0;
private const int GW_HWNDNEXT = 2;
private const int SW_HIDE = 0;
private const int SW_SHOW = 5;

[DllImport("User32.dll")]
private extern static int GetWindow(int hWnd, int wCmd);
[DllImport("User32.dll")]
private extern static int GetWindowLongA(int hWnd, int wIndx);
[DllImport("user32.dll")]
private static extern bool GetWindowText(int hWnd, StringBuilder title, int maxBufSize);
[DllImport("user32.dll", CharSet = CharSet.Auto)]
private extern static int GetWindowTextLength(IntPtr hWnd);
[DllImport("user32.dll")]
public static extern int ShowWindow(int hwnd, int nCmdShow);

//获得包含窗体可见、有边框、有最大化按钮的窗体的句柄和标题(窗体的属性出这几种外还有很多种)
public static List<FromInfo> GetHandleList(int Handle)
{
List<FromInfo> fromInfo = new List<FromInfo>();
int handle = GetWindow(Handle, GW_HWNDFIRST);
while (handle > 0)
{
int IsTask = WS_VISIBLE | WS_BORDER | WS_MAXIMIZEBOX;//窗体可见、有边框、有最大化按钮
int lngStyle = GetWindowLongA(handle, GWL_STYLE);
bool TaskWindow = ((lngStyle & IsTask) == IsTask);
if (TaskWindow)
{
int length = GetWindowTextLength(new IntPtr(handle));
StringBuilder stringBuilder = new StringBuilder(2 * length + 1);
GetWindowText(handle, stringBuilder, stringBuilder.Capacity);
string strTitle = stringBuilder.ToString();
if (!string.IsNullOrEmpty(strTitle))
{
fromInfo.Add(new FromInfo(strTitle, handle));
}
else
{
fromInfo.Add(new FromInfo("", handle));
}
}
handle = GetWindow(handle, GW_HWNDNEXT);
}
return fromInfo;
}
//获得所有窗体的句柄和标题
public static List<FromInfo> GetHandleList(int Handle)
{
List<FromInfo> fromInfo = new List<FromInfo>();
int handle = GetWindow(Handle, GW_HWNDFIRST);
while (handle > 0)
{
int length = GetWindowTextLength(new IntPtr(handle));
StringBuilder stringBuilder = new StringBuilder(2 * length + 1);
GetWindowText(handle, stringBuilder, stringBuilder.Capacity);
string strTitle = stringBuilder.ToString();
if (!string.IsNullOrEmpty(strTitle))
{
fromInfo.Add(new FromInfo(strTitle, handle));
}
else
{
fromInfo.Add(new FromInfo("", handle));
}
handle = GetWindow(handle, GW_HWNDNEXT);
}
return fromInfo;
}

public class FromInfo
{
public FromInfo(string title, int handle)
{
this.title = title;
this.handle = handle;
}
private string title;
private int handle;

public string Title
{
get { return title; }
set { title = value; }
}
public int Handle
{
get { return handle; }
set { handle = value; }
}
}

//获得窗体句柄和标题
private void button1_Click(object sender, EventArgs e)
{
List<FromInfo> fromInfo = GetHandleList(this.Handle.ToInt32());
}
private void button2_Click(object sender, EventArgs e)
{
//隐藏窗体
ShowWindow(this.Handle.ToInt32(), SW_HIDE);
//显示窗体
ShowWindow(this.Handle.ToInt32(), SW_SHOW);
}