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Code Issues Releases Wiki Activity

Added `Null` field to all GDI handles

pull/348/head
David Hall 2022-11-16 21:36:40 -07:00
parent ebd7cb0a5a
commit 19b4ef1fdf
1 changed files with 21 additions and 0 deletions
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21
PInvoke/Gdi32/WinGdi.SafeDCHandles.cs
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@ -60,6 +60,9 @@ namespace Vanara.PInvoke
private SafeHBITMAP() : base() { }
/// <summary>A NULL value for this handle.</summary>
public static readonly SafeHBITMAP Null = new(IntPtr.Zero, false);
/// <summary>Performs an implicit conversion from <see cref="SafeHBITMAP"/> to <see cref="HBITMAP"/>.</summary>
/// <param name="h">The safe handle instance.</param>
/// <returns>The result of the conversion.</returns>
@ -88,6 +91,9 @@ namespace Vanara.PInvoke
private SafeHBRUSH() : base() { }
/// <summary>A NULL value for this handle.</summary>
public static readonly SafeHBRUSH Null = new(IntPtr.Zero, false);
/// <summary>Performs an implicit conversion from <see cref="SafeHBRUSH"/> to <see cref="HBRUSH"/>.</summary>
/// <param name="h">The safe handle instance.</param>
/// <returns>The result of the conversion.</returns>
@ -114,6 +120,9 @@ namespace Vanara.PInvoke
private SafeHDC() : base() { }
/// <summary>A NULL value for this handle.</summary>
public static readonly SafeHDC Null = new(IntPtr.Zero, false);
/// <summary>Gets the screen compatible device context handle.</summary>
/// <value>The screen compatible device context handle.</value>
public static SafeHDC ScreenCompatibleDCHandle => CreateCompatibleDC(HDC.NULL);
@ -153,6 +162,9 @@ namespace Vanara.PInvoke
private SafeHFONT() : base() { }
/// <summary>A NULL value for this handle.</summary>
public static readonly SafeHFONT Null = new(IntPtr.Zero, false);
/// <summary>Performs an implicit conversion from <see cref="SafeHFONT"/> to <see cref="HFONT"/>.</summary>
/// <param name="h">The safe handle instance.</param>
/// <returns>The result of the conversion.</returns>
@ -182,6 +194,9 @@ namespace Vanara.PInvoke
private SafeHPALETTE() : base() { }
/// <summary>A NULL value for this handle.</summary>
public static readonly SafeHPALETTE Null = new(IntPtr.Zero, false);
/// <summary>Performs an implicit conversion from <see cref="SafeHPALETTE"/> to <see cref="HGDIOBJ"/>.</summary>
/// <param name="h">The safe handle instance.</param>
/// <returns>The result of the conversion.</returns>
@ -210,6 +225,9 @@ namespace Vanara.PInvoke
private SafeHPEN() : base() { }
/// <summary>A NULL value for this handle.</summary>
public static readonly SafeHPEN Null = new(IntPtr.Zero, false);
/// <summary>Performs an implicit conversion from <see cref="SafeHPEN"/> to <see cref="HGDIOBJ"/>.</summary>
/// <param name="h">The safe handle instance.</param>
/// <returns>The result of the conversion.</returns>
@ -238,6 +256,9 @@ namespace Vanara.PInvoke
private SafeHRGN() : base() { }
/// <summary>A NULL value for this handle.</summary>
public static readonly SafeHRGN Null = new(IntPtr.Zero, false);
/// <summary>Performs an implicit conversion from <see cref="SafeHRGN"/> to <see cref="HGDIOBJ"/>.</summary>
/// <param name="h">The safe handle instance.</param>
/// <returns>The result of the conversion.</returns>