More Information about underlying ​.NET controls of the AlarmApp and the HistoricalTrendApp

The AlarmApp and HistoricalTrendApp are OMI apps that provide a wrapper around .NET controls to expose various properties Other properties that are not directly expose through the OMI app can still be scripted, however, there are some restrictions when using .NET controls in an OMI ViewApp script.

• The System Platform IDE only exposes public properties, methods, and events of a .Net Control. All public properties and methods can be used in named and predefined scripts. All public events can be used for event scripts.

  .NET methods, properties, and events set to Private scope are not available to configure and use in a ViewApp. Also, .NET properties with the Browsable attribute set to false cannot be viewed or used.

• The following table lists .NET control primitive data types that can be used in ViewApp scripts.

  .NET Primitive Data Type	.NET Type	Description
  Boolean	System.Boolean	Logical true or false
  Byte	System.byte	8-bit unsigned integer
  SByte	System.Sbyte	8-bit signed integer
  Int16	System.Int16	16-bit signed integer
  UInt16	System.UInt16	16-bit unsigned integer
  Int32	System.Int32	32-bit signed integer
  UInt32	System.UInt32	32-bit unsigned integer
  Int64	System.Int64	64-bit signed integer
  UInt64	System.UInt64	64-bit unsigned integer
  Char	System.char	Single 16-bit Unicode character
  Double	System.Double	64-bit single-precision floating point
  Single	System.Single	32-bit single-precision floating point

The pointer primitive data types (IntPtr and UIntPtr) cannot be shown or configured from the Layout or ViewApp editors Properties grids. However,both data types can be used in ViewApp scripts.