private static DialogResult ShowCore(IWin32Window owner, string text, string caption,
MessageBoxButtons buttons, MessageBoxIcon icon, MessageBoxDefaultButton defaultButton,
MessageBoxOptions options, bool showHelp)
{
MB style = GetMessageBoxStyle(owner, buttons, icon, defaultButton, options, showHelp);
IntPtr handle = IntPtr.Zero;
if (showHelp || ((options & (MessageBoxOptions.ServiceNotification | MessageBoxOptions.DefaultDesktopOnly)) == 0))
{
if (owner is null)
{
handle = GetActiveWindow();
}
else
{
handle = Control.GetSafeHandle(owner);
}
}
IntPtr userCookie = IntPtr.Zero;
if (Application.UseVisualStyles)
{
// CLR4.0 or later, shell32.dll needs to be loaded explicitly.
if (Kernel32.GetModuleHandleW(Libraries.Shell32) == IntPtr.Zero)
{
if (Kernel32.LoadLibraryFromSystemPathIfAvailable(Libraries.Shell32) == IntPtr.Zero)
{
int lastWin32Error = Marshal.GetLastWin32Error();
throw new Win32Exception(lastWin32Error, string.Format(SR.LoadDLLError, Libraries.Shell32));
}
}
// Activate theming scope to get theming for controls at design time and when hosted in browser.
// NOTE: If a theming context is already active, this call is very fast, so shouldn't be a perf issue.
userCookie = ThemingScope.Activate(Application.UseVisualStyles);
}
Application.BeginModalMessageLoop();
try
{
return((DialogResult)MessageBoxW(new HandleRef(owner, handle), text, caption, style));
}
finally
{
Application.EndModalMessageLoop();
ThemingScope.Deactivate(userCookie);
// Right after the dialog box is closed, Windows sends WM_SETFOCUS back to the previously active control
// but since we have disabled this thread main window the message is lost. So we have to send it again after
// we enable the main window.
User32.SendMessageW(new HandleRef(owner, handle), User32.WM.SETFOCUS);
}
}
private ImageListStreamer(SerializationInfo info, StreamingContext context)
{
SerializationInfoEnumerator sie = info.GetEnumerator();
if (sie is null)
{
return;
}
while (sie.MoveNext())
{
if (string.Equals(sie.Name, "Data", StringComparison.OrdinalIgnoreCase))
{
#if DEBUG
try
{
#endif
byte[] dat = (byte[])sie.Value;
if (dat != null)
{
// We enclose this imagelist handle create in a theming scope.
IntPtr userCookie = ThemingScope.Activate(Application.UseVisualStyles);
try
{
using MemoryStream ms = new MemoryStream(Decompress(dat));
lock (internalSyncObject)
{
ComCtl32.InitCommonControls();
nativeImageList = new ImageList.NativeImageList(new Ole32.GPStream(ms));
}
}
finally
{
ThemingScope.Deactivate(userCookie);
}
if (nativeImageList.Handle == IntPtr.Zero)
{
throw new InvalidOperationException(SR.ImageListStreamerLoadFailed);
}
}
#if DEBUG
}
catch (Exception e)
{
Debug.Fail("ImageList serialization failure: " + e.ToString());
throw;
}
#endif
}
}
}
private static DialogResult ShowCore(IWin32Window owner, string text, string caption,
MessageBoxButtons buttons, MessageBoxIcon icon, MessageBoxDefaultButton defaultButton,
MessageBoxOptions options, bool showHelp)
{
if (!ClientUtils.IsEnumValid(buttons, (int)buttons, (int)MessageBoxButtons.OK, (int)MessageBoxButtons.RetryCancel))
{
throw new InvalidEnumArgumentException(nameof(buttons), (int)buttons, typeof(MessageBoxButtons));
}
// valid values are 0x0 0x10 0x20 0x30 0x40, chop off the last 4 bits and check that it's between 0 and 4.
if (!WindowsFormsUtils.EnumValidator.IsEnumWithinShiftedRange(icon, /*numBitsToShift*/ 4, /*min*/ 0x0, /*max*/ 0x4))
{
throw new InvalidEnumArgumentException(nameof(icon), (int)icon, typeof(MessageBoxIcon));
}
// valid values are 0x0 0x100, 0x200, chop off the last 8 bits and check that it's between 0 and 2.
if (!WindowsFormsUtils.EnumValidator.IsEnumWithinShiftedRange(defaultButton, /*numBitsToShift*/ 8, /*min*/ 0x0, /*max*/ 0x2))
{
throw new InvalidEnumArgumentException(nameof(defaultButton), (int)defaultButton, typeof(DialogResult));
}
// options intentionally not verified because we don't expose all the options Win32 supports.
if (!SystemInformation.UserInteractive && (options & (MessageBoxOptions.ServiceNotification | MessageBoxOptions.DefaultDesktopOnly)) == 0)
{
throw new InvalidOperationException(SR.CantShowModalOnNonInteractive);
}
if (owner != null && (options & (MessageBoxOptions.ServiceNotification | MessageBoxOptions.DefaultDesktopOnly)) != 0)
{
throw new ArgumentException(SR.CantShowMBServiceWithOwner, nameof(options));
}
if (showHelp && (options & (MessageBoxOptions.ServiceNotification | MessageBoxOptions.DefaultDesktopOnly)) != 0)
{
throw new ArgumentException(SR.CantShowMBServiceWithHelp, nameof(options));
}
MB style = (showHelp) ? MB.HELP : 0;
style |= (MB)buttons | (MB)icon | (MB)defaultButton | (MB)options;
IntPtr handle = IntPtr.Zero;
if (showHelp || ((options & (MessageBoxOptions.ServiceNotification | MessageBoxOptions.DefaultDesktopOnly)) == 0))
{
if (owner == null)
{
handle = GetActiveWindow();
}
else
{
handle = Control.GetSafeHandle(owner);
}
}
IntPtr userCookie = IntPtr.Zero;
if (Application.UseVisualStyles)
{
// CLR4.0 or later, shell32.dll needs to be loaded explicitly.
if (Kernel32.GetModuleHandleW(Libraries.Shell32) == IntPtr.Zero)
{
if (Kernel32.LoadLibraryFromSystemPathIfAvailable(Libraries.Shell32) == IntPtr.Zero)
{
int lastWin32Error = Marshal.GetLastWin32Error();
throw new Win32Exception(lastWin32Error, string.Format(SR.LoadDLLError, Libraries.Shell32));
}
}
// Activate theming scope to get theming for controls at design time and when hosted in browser.
// NOTE: If a theming context is already active, this call is very fast, so shouldn't be a perf issue.
userCookie = ThemingScope.Activate(Application.UseVisualStyles);
}
Application.BeginModalMessageLoop();
DialogResult result;
try
{
result = Win32ToDialogResult(MessageBoxW(new HandleRef(owner, handle), text, caption, style));
}
finally
{
Application.EndModalMessageLoop();
ThemingScope.Deactivate(userCookie);
}
// Right after the dialog box is closed, Windows sends WM_SETFOCUS back to the previously active control
// but since we have disabled this thread main window the message is lost. So we have to send it again after
// we enable the main window.
User32.SendMessageW(new HandleRef(owner, handle), User32.WM.SETFOCUS);
return(result);
}