7 references to IsNull
System.Private.Windows.Core (1)
Windows\Win32\Graphics\Gdi\RegionScope.cs (1)
86
if (!
IsNull
)
System.Windows.Forms (6)
System\Windows\Forms\Control.cs (1)
9596
Debug.Assert(!hClippingRegion.
IsNull
, "CreateRectRgn() failed.");
System\Windows\Forms\Controls\TextBox\TextBoxBase.cs (1)
2676
if (!nonClientRegion.
IsNull
)
System\Windows\Forms\MDI\MDIClient.cs (2)
293
if (rgn1.
IsNull
|| rgn2.
IsNull
)
System\Windows\Forms\Rendering\DCMapping.cs (2)
51
Debug.Assert(!clippingRegion.
IsNull
, "CreateRectRgn() failed.");
66
if (!originalRegion.
IsNull
)