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RogerB's MessageBoxEx from CODEPROJECT; an include-only extension for MessageBox, supporting a timeout timer
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/* | |
* From author RogerB: https://www.codeproject.com/script/membership/view.aspx?mid=716667 | |
* Code source article: https://www.codeproject.com/articles/7968/messagebox-with-a-timeout-for-net | |
* Licensing: https://www.codeproject.com/info/cpol10.aspx | |
*/ | |
using System; | |
using System.Text; | |
using System.Runtime.InteropServices; | |
using System.Security.Permissions; | |
[assembly: SecurityPermission(SecurityAction.RequestMinimum, UnmanagedCode = true)] | |
namespace System.Windows.Forms | |
{ | |
public class MessageBoxEx | |
{ | |
public static DialogResult Show(string text, uint uTimeout) | |
{ | |
Setup("", uTimeout); | |
return MessageBox.Show(text); | |
} | |
public static DialogResult Show(string text, string caption, uint uTimeout) | |
{ | |
Setup(caption, uTimeout); | |
return MessageBox.Show(text, caption); | |
} | |
public static DialogResult Show(string text, string caption, MessageBoxButtons buttons, uint uTimeout) | |
{ | |
Setup(caption, uTimeout); | |
return MessageBox.Show(text, caption, buttons); | |
} | |
public static DialogResult Show(string text, string caption, MessageBoxButtons buttons, MessageBoxIcon icon, uint uTimeout) | |
{ | |
Setup(caption, uTimeout); | |
return MessageBox.Show(text, caption, buttons, icon); | |
} | |
public static DialogResult Show(string text, string caption, MessageBoxButtons buttons, MessageBoxIcon icon, MessageBoxDefaultButton defButton, uint uTimeout) | |
{ | |
Setup(caption, uTimeout); | |
return MessageBox.Show(text, caption, buttons, icon, defButton); | |
} | |
public static DialogResult Show(string text, string caption, MessageBoxButtons buttons, MessageBoxIcon icon, MessageBoxDefaultButton defButton, MessageBoxOptions options, uint uTimeout) | |
{ | |
Setup(caption, uTimeout); | |
return MessageBox.Show(text, caption, buttons, icon, defButton, options); | |
} | |
public static DialogResult Show(IWin32Window owner, string text, uint uTimeout) | |
{ | |
Setup("", uTimeout); | |
return MessageBox.Show(owner, text); | |
} | |
public static DialogResult Show(IWin32Window owner, string text, string caption, uint uTimeout) | |
{ | |
Setup(caption, uTimeout); | |
return MessageBox.Show(owner, text, caption); | |
} | |
public static DialogResult Show(IWin32Window owner, string text, string caption, MessageBoxButtons buttons, uint uTimeout) | |
{ | |
Setup(caption, uTimeout); | |
return MessageBox.Show(owner, text, caption, buttons); | |
} | |
public static DialogResult Show(IWin32Window owner, string text, string caption, MessageBoxButtons buttons, MessageBoxIcon icon, uint uTimeout) | |
{ | |
Setup(caption, uTimeout); | |
return MessageBox.Show(owner, text, caption, buttons, icon); | |
} | |
public static DialogResult Show(IWin32Window owner, string text, string caption, MessageBoxButtons buttons, MessageBoxIcon icon, MessageBoxDefaultButton defButton, uint uTimeout) | |
{ | |
Setup(caption, uTimeout); | |
return MessageBox.Show(owner, text, caption, buttons, icon, defButton); | |
} | |
public static DialogResult Show(IWin32Window owner, string text, string caption, MessageBoxButtons buttons, MessageBoxIcon icon, MessageBoxDefaultButton defButton, MessageBoxOptions options, uint uTimeout) | |
{ | |
Setup(caption, uTimeout); | |
return MessageBox.Show(owner, text, caption, buttons, icon, defButton, options); | |
} | |
public delegate IntPtr HookProc(int nCode, IntPtr wParam, IntPtr lParam); | |
public delegate void TimerProc(IntPtr hWnd, uint uMsg, UIntPtr nIDEvent, uint dwTime); | |
public const int WH_CALLWNDPROCRET = 12; | |
public const int WM_DESTROY = 0x0002; | |
public const int WM_INITDIALOG = 0x0110; | |
public const int WM_TIMER = 0x0113; | |
public const int WM_USER = 0x400; | |
public const int DM_GETDEFID = WM_USER + 0; | |
[DllImport("User32.dll")] | |
public static extern UIntPtr SetTimer(IntPtr hWnd, UIntPtr nIDEvent, uint uElapse, TimerProc lpTimerFunc); | |
[DllImport("User32.dll")] | |
public static extern IntPtr SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, IntPtr lParam); | |
[DllImport("user32.dll")] | |
public static extern IntPtr SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId); | |
[DllImport("user32.dll")] | |
public static extern int UnhookWindowsHookEx(IntPtr idHook); | |
[DllImport("user32.dll")] | |
public static extern IntPtr CallNextHookEx(IntPtr idHook, int nCode, IntPtr wParam, IntPtr lParam); | |
[DllImport("user32.dll")] | |
public static extern int GetWindowTextLength(IntPtr hWnd); | |
[DllImport("user32.dll")] | |
public static extern int GetWindowText(IntPtr hWnd, StringBuilder text, int maxLength); | |
[DllImport("user32.dll")] | |
public static extern int EndDialog(IntPtr hDlg, IntPtr nResult); | |
[StructLayout(LayoutKind.Sequential)] | |
public struct CWPRETSTRUCT | |
{ | |
public IntPtr lResult; | |
public IntPtr lParam; | |
public IntPtr wParam; | |
public uint message; | |
public IntPtr hwnd; | |
}; | |
private const int TimerID = 42; | |
private static HookProc hookProc; | |
private static TimerProc hookTimer; | |
private static uint hookTimeout; | |
private static string hookCaption; | |
private static IntPtr hHook; | |
static MessageBoxEx() | |
{ | |
hookProc = new HookProc(MessageBoxHookProc); | |
hookTimer = new TimerProc(MessageBoxTimerProc); | |
hookTimeout = 0; | |
hookCaption = null; | |
hHook = IntPtr.Zero; | |
} | |
private static void Setup(string caption, uint uTimeout) | |
{ | |
if (hHook != IntPtr.Zero) | |
throw new NotSupportedException("multiple calls are not supported"); | |
hookTimeout = uTimeout; | |
hookCaption = caption != null ? caption : ""; | |
hHook = SetWindowsHookEx(WH_CALLWNDPROCRET, hookProc, IntPtr.Zero, AppDomain.GetCurrentThreadId()); | |
} | |
private static IntPtr MessageBoxHookProc(int nCode, IntPtr wParam, IntPtr lParam) | |
{ | |
if (nCode < 0) | |
return CallNextHookEx(hHook, nCode, wParam, lParam); | |
CWPRETSTRUCT msg = (CWPRETSTRUCT)Marshal.PtrToStructure(lParam, typeof(CWPRETSTRUCT)); | |
IntPtr hook = hHook; | |
if (hookCaption != null && msg.message == WM_INITDIALOG) | |
{ | |
int nLength = GetWindowTextLength(msg.hwnd); | |
StringBuilder text = new StringBuilder(nLength + 1); | |
GetWindowText(msg.hwnd, text, text.Capacity); | |
if (hookCaption == text.ToString()) | |
{ | |
hookCaption = null; | |
SetTimer(msg.hwnd, (UIntPtr)TimerID, hookTimeout, hookTimer); | |
UnhookWindowsHookEx(hHook); | |
hHook = IntPtr.Zero; | |
} | |
} | |
return CallNextHookEx(hook, nCode, wParam, lParam); | |
} | |
private static void MessageBoxTimerProc(IntPtr hWnd, uint uMsg, UIntPtr nIDEvent, uint dwTime) | |
{ | |
if (nIDEvent == (UIntPtr)TimerID) | |
{ | |
short dw = (short)SendMessage(hWnd, DM_GETDEFID, IntPtr.Zero, IntPtr.Zero); | |
EndDialog(hWnd, (IntPtr)dw); | |
} | |
} | |
} | |
} |
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