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The SupportsDSTproperty retrieves a value that indicates whether a Time Zone supports Daylight-Saving Time.
Syntax
HRESULT get_SupportsDST( VARIANT_BOOL * pfSupportsDST ); |
Parameters
- pfSupportsDST
-
[out] Reference to the Boolean flag. VARIANT_TRUEwhen the Time Zone supports Daylight-Saving Time. For information about the VARIANT_BOOLtype, see the union member of the PROPVARIANTstructure.
Return Value
This method returns the standard values E_INVALIDARG, E_OUTOFMEMORY, E_UNEXPECTED, and E_FAIL, as well as the following:
- S_OK
-
The method completed successfully.
Remarks
All other ITimeZoneproperties are defined only if the SupportsDSTproperty is VARIANT_TRUE.
The VARIANT_BOOLdata type (also known as VT_BOOL) uses the value -1 to represent TRUEand 0 to represent FALSE. It is defined in the wtypes.hheader file in the following manner:
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typedef short VARIANT_BOOL; |
A common programming error occurs when, for readability purposes, you want to set a VARIANT_BOOLvalue to TRUEor FALSE. You can achieve the same effect by using the aliases VARIANT_TRUEand VARIANT_FALSE, which are also defined in the wtypes.hheader file.
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#define VARIANT_TRUE ((VARIANT_BOOL)0xffff) #define VARIANT_FALSE ((VARIANT_BOOL)0) |
Requirements
Header | pimstore.h |
Library | Pimstore.lib |
Windows Embedded CE | Windows CE 2.0 and later |
Windows Mobile | Windows Mobile Version 5.0 and later |
See Also
Reference
ITimeZonePocket Outlook Object Model Interfaces