6 references to IsNull
System.Windows.Forms (5)
System\Windows\Forms\Accessibility\LabelEditUiaTextProvider.cs (1)
377
if (hdc.
IsNull
)
System\Windows\Forms\ActiveX\AxHost.cs (1)
1062
if (dc.
IsNull
)
System\Windows\Forms\Controls\ComboBox\ComboBox.ComboBoxUiaTextProvider.cs (1)
452
if (hdc.
IsNull
)
System\Windows\Forms\Controls\TextBox\TextBoxBase.TextBoxBaseUiaTextProvider.cs (1)
458
if (hdc.
IsNull
)
System\Windows\Forms\Controls\ToolStrips\ToolStripTextBox.ToolStripTextBoxControl.cs (1)
235
if (hdc.
IsNull
)
WinFormsControlsTest (1)
ScalingBeforeChanges.cs (1)
37
if (!dc.
IsNull
)