boolean (WMI)

The boolean data type is a VT_BOOL parameter that takes on the value of VARIANT_TRUE (–1) or VARIANT_FALSE (0). The following table lists the difference between the programmatic representations of logical TRUE in C/C++ and the Automation type.

Language	Value	Numerical value
C/C++	TRUE	1
Automation	VARIANT_TRUE	–1

Both types are nonzero and therefore not FALSE, but have different representations for TRUE.