IRangeValueProvider::get_LargeChange method (uiautomationcore.h)

Specifies the value that is added to or subtracted from the IRangeValueProvider::Value property when a large change is made, such as when the PAGE DOWN key is pressed.

This property is read-only.

Syntax

HRESULT get_LargeChange(
  double *pRetVal
);

Parameters

pRetVal

Return value

None

Remarks

The LargeChange property can support Not a Number (NaN) value. When returning a NaN value, the provider should return a quiet (non-signaling) NaN to avoid raising an exception if floating-point exceptions are turned on. The following example shows how to create a quiet NaN:

ULONGLONG ulNaN = 0xFFFFFFFFFFFFFFFF;
    *pRetVal = *reinterpret_cast<double*>(&ulNaN);

Alternatively, you can use the following function from the standard C++ libraries:

numeric_limits<double>::quiet_NaN( )

Requirements

See also

IRangeValueProvider

UI Automation Providers Overview