今天就跟大家聊聊有关怎么在c#项目中通过调用Win32Api关闭当前应用，可能很多人都不太了解，为了让大家更加了解，小编给大家总结了以下内容，希望大家根据这篇文章可以有所收获。
Win32 API即为Microsoft 32位平台的应用程序编程接口（Application Programming Interface）。所有在Win32平台上运行的应用程序都可以调用这些函数
使用Win32 API，应用程序可以充分挖掘Windows的32位操作系统的潜力。 Microsoft的所有32位平台都支持统一的API，包括函数、结构、消息、宏及接口。使用 Win32 API不但可以开发出在各种平台上都能成功运行的应用程序，而且也可以充分利用每个平台特有的功能和属性。
在具体编程时，程序实现方式的差异依赖于相应平台的底层功能的不同。最显著的差异是某些函数只能在更强大的平台上实现其功能。例如，安全函数只能在Windows NT操作系统下使用。另外一些主要差别就是系统限制，比如值的范围约束，或函数可管理的项目个数等等。
思路
使用EnumWindows接口枚举当前窗口;
过滤掉不可用、隐藏、最小化的窗口；
过滤掉子窗口；
通过标题、类名过滤掉系统窗口；
使用PostMessage发送关闭窗口信息。
// 过滤掉系统的一些窗口
private static string[] filterTitles = new string[1] { "program manager"};
private static string[] filterClasses = new string[5] { "shell_traywnd", "workerw", "button", "progman", "windows.ui.core.corewindow"};
private void CloseCurrentApp()
{
CallBack sort = new CallBack(EnumCallback);
EnumWindows(sort, 0);
return;
}
private bool EnumCallback(IntPtr hwnd, int lParam)
{
string title = GetWindowText(hwnd);
StringBuilder className = new StringBuilder(256);
int nRet = GetClassName(hwnd, className, className.Capacity);
if (nRet == 0)
className.Append("");
if (!IsWindowVisible(hwnd))
return true;
if (!IsWindowEnabled(hwnd))
return true;
if (IsIconic(hwnd))
return true;
// 过滤掉子窗口
IntPtr parent = GetParent(hwnd);
string parentTitle = GetWindowText(parent);
if (parent != IntPtr.Zero)
{
if (IsWindowVisible(parent) && IsWindowEnabled(parent))
return true;
}
IntPtr owner = GetWindow(hwnd, GW_OWNER);
if (owner != IntPtr.Zero)
{
if (IsWindowVisible(owner) && IsWindowEnabled(owner))
return true;
}
if (!filterTitles.Contains(title.ToLower()) && !filterClasses.Contains(className.ToString().ToLower()))
{
PostMessage(hwnd, WM_SYSCOMMAND, SC_CLOSE, 0);
Console.WriteLine("关闭窗口(句柄：{0}, 标题：{1})！", hwnd, title);
#region 获取窗口信息
int processID = -1;
long threadID = -1;
processID = GetWindowThreadProcessId(hwnd, out threadID);
bool isiconic = IsIconic(hwnd);
uint gwlStyle = (uint)GetWindowLong(hwnd, GWL_STYLE);
IntPtr hProcess = OpenProcess(ProcessAccessFlags.QueryInformation, false, processID);
string fullPath = "";
if (hProcess != IntPtr.Zero)
{
int capacity = 1024;
StringBuilder processName = new StringBuilder(capacity);
QueryFullProcessImageName(hProcess, 0, processName, ref capacity);
fullPath = processName.ToString(0, capacity);
CloseHandle(hProcess);
}
Console.WriteLine("-------------------窗口info:---------------");
Console.WriteLine("====标题：{0} 句柄：{1}====", title, hwnd);
Console.WriteLine("====父窗口标题：{0} 父窗口句柄：{1}====", parentTitle, parent);
Console.WriteLine("====进程ID：{0} 类名：{1}====", processID, className.ToString());
Console.WriteLine("====进程名：{0}====", fullPath);
Console.WriteLine("====isiconic：{0} 样式：{1}====", isiconic, gwlStyle);
WINDOWPLACEMENT placement = new WINDOWPLACEMENT();
placement.length = System.Runtime.InteropServices.Marshal.SizeOf(placement);
GetWindowPlacement(hwnd, ref placement);
Console.WriteLine("====placement：{0}====", placement.showCmd);
EnumPropsDelegate prop = new EnumPropsDelegate(EnumPropsProc);
EnumProps(hwnd, prop);
#endregion 获取窗口信息
return false;
}
return true;
}
private bool EnumPropsProc(IntPtr hwnd, IntPtr lpszString, IntPtr hData)
{
string propName = System.Runtime.InteropServices.Marshal.PtrToStringAnsi(lpszString);
Console.WriteLine("====属性：{0} 数据：{1}====", propName, hData);
return true;
}
#region Win32Api
public const int GWL_STYLE = (-16);
public const int GWL_EXSTYLE = (-20);
public const int GW_OWNER = 4;
public const int WS_EX_TOOLWINDOW = 0x00000080;
public const int WM_SYSCOMMAND = 0x0112;
public const int WM_CLOSE = 0x10;
public const int SC_CLOSE = 0xF060;
public delegate bool CallBack(IntPtr hwnd, int lparam);
public delegate bool EnumPropsDelegate(IntPtr hwnd, IntPtr lpszString, IntPtr hData);
[DllImport("user32.dll")]
public static extern int EnumWindows(CallBack x, int y);
[DllImport("user32.dll", CharSet = CharSet.Auto)]
internal static extern int GetWindowText(IntPtr hWnd, System.Text.StringBuilder lpString, int nMaxCount);
[DllImport("user32.dll", CharSet = CharSet.Auto)]
public static extern int GetWindowTextLength(IntPtr hWnd);
[DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)]
public static extern int GetClassName(IntPtr hWnd, System.Text.StringBuilder lpClassName, int nMaxCount);
[DllImport("user32.dll")]
public static extern bool IsWindowVisible(IntPtr hwnd);
[DllImport("user32.dll")]
public static extern bool IsWindowEnabled(IntPtr hwnd);
[DllImport("user32.dll", EntryPoint = "IsIconic")]
public static extern bool IsIconic(IntPtr hWnd);
[DllImport("user32.dll", SetLastError = true)]
public static extern IntPtr GetParent(IntPtr hwnd);
[DllImport("user32.dll", SetLastError = true)]
public static extern IntPtr GetWindow(IntPtr hwndParent, int nCmd);
[DllImport("user32.dll", EntryPoint = "GetWindowLongA", SetLastError = true)]
public static extern long GetWindowLong(IntPtr hwnd, int nIndex);
[DllImport("user32.dll", EntryPoint = "PostMessageA", SetLastError = true)]
public static extern bool PostMessage(IntPtr hwnd, uint Msg, uint wParam, uint lParam);
[DllImport("user32.dll", EntryPoint = "GetWindowThreadProcessId", SetLastError = true,
CharSet = CharSet.Unicode, ExactSpelling = true,
CallingConvention = CallingConvention.StdCall)]
public static extern int GetWindowThreadProcessId(IntPtr hWnd, out long lpdwProcessId);
[DllImport("kernel32.dll", SetLastError = true)]
public static extern IntPtr OpenProcess(
ProcessAccessFlags processAccess,
bool bInheritHandle,
int processId
);
[DllImport("kernel32.dll", SetLastError = true)]
public static extern bool QueryFullProcessImageName([In]IntPtr hProcess, [In]int dwFlags,
[Out]System.Text.StringBuilder lpExeName, ref int lpdwSize);
[DllImport("coredll.dll", SetLastError = true, CallingConvention = CallingConvention.Winapi, CharSet = CharSet.Auto)]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool CloseHandle(IntPtr hObject);
[DllImport("user32.dll", SetLastError = true)]
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool GetWindowPlacement(IntPtr hWnd, ref WINDOWPLACEMENT lpwndpl);
[DllImport("user32.dll")]
public static extern int EnumProps(IntPtr hWnd, EnumPropsDelegate lpEnumFunc);
public struct WINDOWPLACEMENT
{
public int length;
public int flags;
public int showCmd;
public System.Drawing.Point ptMinPosition;
public System.Drawing.Point ptMaxPosition;
public System.Drawing.Rectangle rcNormalPosition;
}
[Flags]
public enum ProcessAccessFlags : uint
{
All = 0x001F0FFF,
Terminate = 0x00000001,
CreateThread = 0x00000002,
VirtualMemoryOperation = 0x00000008,
VirtualMemoryRead = 0x00000010,
VirtualMemoryWrite = 0x00000020,
DuplicateHandle = 0x00000040,
CreateProcess = 0x000000080,
SetQuota = 0x00000100,
SetInformation = 0x00000200,
QueryInformation = 0x00000400,
QueryLimitedInformation = 0x00001000,
Synchronize = 0x00100000
}
public static string GetWindowText(IntPtr hwnd)
{
int capacity = GetWindowTextLength(hwnd) * 2;
System.Text.StringBuilder lpString = new System.Text.StringBuilder(capacity);
GetWindowText(hwnd, lpString, lpString.Capacity);
if (lpString.Length > 0)
{
return lpString.ToString();
}
return string.Empty;
}
#endregion Win32Api看完上述内容，你们对怎么在c#项目中通过调用Win32Api关闭当前应用有进一步的了解吗？如果还想了解更多知识或者相关内容，请关注亿速云行业资讯频道，感谢大家的支持。
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