Bitmap.GetHicon Method
.NET Framework 3.0
Returns the handle to an icon.
Namespace: System.Drawing
Assembly: System.Drawing (in system.drawing.dll)
Assembly: System.Drawing (in system.drawing.dll)
The following code example is designed for use with Windows Forms, and it requires PaintEventArgse, which is a parameter of the Paint event handler. The code performs the following actions:
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Creates a Bitmap.
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Draws that object to the screen.
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Gets an icon handle for the Bitmap.
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Sets the Form.Icon attribute of the form to an icon created from the handle.
private: [System::Runtime::InteropServices::DllImportAttribute("user32.dll",CharSet=CharSet::Auto)] static bool DestroyIcon( IntPtr handle ); private: [SecurityPermission(SecurityAction::Demand, Flags=SecurityPermissionFlag::UnmanagedCode)] void GetHicon_Example( PaintEventArgs^ e ) { // Create a Bitmap object from an image file. Bitmap^ myBitmap = gcnew Bitmap( "c:\\FakePhoto.jpg" ); // Draw myBitmap to the screen. e->Graphics->DrawImage( myBitmap, 0, 0 ); // Get an Hicon for myBitmap. IntPtr Hicon = myBitmap->GetHicon(); // Create a new icon from the handle. System::Drawing::Icon^ newIcon = ::Icon::FromHandle( Hicon ); // Set the form Icon attribute to the new icon. this->Icon = newIcon; // Destroy the Icon, since the form creates // its own copy of the icon. DestroyIcon( newIcon->Handle ); }
- SecurityPermission for calling into unmanaged code. Related enumeration: UnmanagedCode
Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.Community Additions
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