9 references to IsNull
System.Private.Windows.Core (1)
Windows\Win32\Graphics\Gdi\RegionScope.cs (1)
86
if (!
IsNull
)
System.Windows.Forms (5)
System\Windows\Forms\Control.cs (1)
8793
Debug.Assert(!hClippingRegion.
IsNull
, "CreateRectRgn() failed.");
System\Windows\Forms\MDI\MDIClient.cs (2)
295
if (rgn1.
IsNull
|| rgn2.
IsNull
)
System\Windows\Forms\Rendering\DCMapping.cs (2)
51
Debug.Assert(!clippingRegion.
IsNull
, "CreateRectRgn() failed.");
66
if (!originalRegion.
IsNull
)
System.Windows.Forms.Primitives.Tests (3)
System\Windows\Forms\DeviceContextScopeTests.cs (1)
47
Assert.False(regionScope.
IsNull
);
Windows\Win32\RegionTests.cs (2)
23
Assert.False(hregion.
IsNull
);
41
Assert.True(hregion.
IsNull
);