Automation Functions

A version of this page is also available for

Windows Embedded CE 6.0 R3

4/8/2010

The following table shows the Automation functions with a description of the purpose of each.

Note

Windows Mobile may not support all of the programming elements in this section. For information about differences between the COM implementation available for Windows Mobile devices and that available for Windows Embedded CE devices, see COM and DCOM in Windows Mobile Devices.

Programming element	Description
BstrFromVector	This function returns a BSTR, assigning each element of the vector to a character in the BSTR.
CreateErrorInfo	This function creates an instance of a generic error object.
CreateTypeLib2	This function creates a type library in the file/in-memory format that makes use of memory-mapped files for 32-bit platforms.
DispGetIDsOfNames	This function uses type information to convert a set of names to DISPIDs.
DispGetParam	This function retrieves a parameter from the DISPPARAMS structure, checks both named parameters and positional parameters, and coerces the parameter to the specified type.
DispInvoke	This function automatically calls member functions on an interface, given the type information for the interface.
GetErrorInfo	This function obtains the error information pointer set by the previous call to SetErrorInfo in the current logical thread.
LoadRegTypeLib	This function uses registry information to load a type library.
LoadTypeLib	This function loads and registers a typelib2 type library.
RegisterTypeLib	This function adds information about a type library to the system registry.
SafeArrayAccessData	This function increments the lock count of an array, and retrieves a pointer to the array data.
SafeArrayAllocData	This function allocates memory for a safearray, based on a descriptor created with SafeArrayAllocDescriptor.
SafeArrayAllocDescriptor	This function allocates memory for a safearray descriptor, allowing the creation of safearrays that contain elements with data types other than those provided by SafeArrayCreate.
SafeArrayCopy	This function creates a copy of an existing safearray.
SafeArrayCopyData	This function copies the source array to the target array after releasing any resources in the target array.
SafeArrayCreate	This function creates a new array descriptor, allocates and initializes the data for the array, and returns a pointer to the new array descriptor.
SafeArrayCreateVector	This function creates a one-dimensional array whose lower bound is always zero.
SafeArrayDestroy	This function destroys an existing array descriptor and all of the data in the array.
SafeArrayDestroyData	This function destroys all the data in a safearray.
SafeArrayDestroyDescriptor	This function destroys a descriptor of a safearray.
SafeArrayGetDim	This function returns the number of dimensions in the array.
SafeArrayGetElement	This function retrieves a single element of the array.
SafeArrayGetElemsize	This function retrieves the size (in bytes) of the elements of a safearray.
SafeArrayGetLBound	This function returns the lower bound for any dimension of a safearray.
SafeArrayGetUBound	This function returns the upper bound for any dimension of a safearray.
SafeArrayLock	This function increments the lock count of an array, and places a pointer to the array data in pvData of the array descriptor.
SafeArrayPtrOfIndex	This function returns a pointer to an array element.
SafeArrayPutElement	This function assigns a single element to the array.
SafeArrayRedim	This function changes the right most or least significant bound of a safearray.
SafeArrayUnaccessData	This function decrements the lock count of an array, and invalidates the pointer retrieved by SafeArrayAccessData.
SafeArrayUnlock	This function decrements the lock count of an array so it can be freed or resized.
SetErrorInfo	This function sets the error information object for the current thread of execution.
SysAllocString	This function allocates a new string and copies the passed string into it.
SysAllocStringByteLen	This function takes an ANSI string as input, and returns a BSTR that contains an ANSI string.
SysAllocStringLen	This function allocates a new string, copies cch characters from the passed string into it, and then appends a null character.
SysFreeString	This function frees a string allocated previously by SysAllocString, SysAllocStringByteLen, SysReAllocString, SysAllocStringLen, or SysReAllocStringLen.
SysReAllocString	This function allocates a new BSTR and copies the passed string into it, then frees the BSTR referenced by pbstr, and finally resets pbstr to point to the new BSTR.
SysReAllocStringLen	This function creates a new BSTR that contains a specified number of characters from an old BSTR, and frees the old BSTR.
SysStringByteLen	This function returns the length (in bytes) of a BSTR.
SysStringLen	This function returns the length of a BSTR.
SystemTimeToVariantTime	This function converts the variant representation of time to system-time values.
UnRegisterTypeLib	This function removes type library information from the system registry.
VarBoolFromCy	This function converts variant data types to BOOL from CURRENCY.
VarBoolFromDate	This function converts variant data types to BOOL from DATE.
VarBoolFromDec	This function converts variant data types to BOOL from DECIMAL.
VarBoolFromDisp	This function converts variant data types to BOOL from IDispatch.
VarBoolFromI2	This function converts variant data types to BOOL from short.
VarBoolFromI4	This function converts variant data types to BOOL from long.
VarBoolFromR4	This function converts variant data types to BOOL from float.
VarBoolFromR8	This function converts variant data types to BOOL from double.
VarBoolFromStr	This function converts variant data types to BOOL from OLECHAR.
VarBoolFromUI1	This function converts variant data types to BOOL from unsigned char.
VarBstrFromBool	This function converts variant data types to BSTR from BOOL.
VarBstrFromCy	This function converts variant data types to BSTR from CURRENCY.
VarBstrFromDate	This function converts variant data types to BSTR from DATE.
VarBstrFromDec	This function converts variant data types to BSTR from DECIMAL.
VarBstrFromDisp	This function converts variant data types to BSTR from IDispatch.
VarBstrFromI2	This function converts variant data types to BSTR from short.
VarBstrFromI4	This function converts variant data types to BSTR from long.
VarBstrFromR4	This function converts variant data types to BSTR from float.
VarBstrFromR8	This function converts variant data types to BSTR from double.
VarBstrFromUI1	This function converts variant data types to BSTR from BYTE.
VarCyFromBool	This function converts variant data types to CURRENCY from BOOL.
VarCyFromDate	This function converts variant data types to CURRENCY from DATE.
VarCyFromDec	This function converts variant data types to CURRENCY from DECIMAL.
VarCyFromDisp	This function converts variant data types to CURRENCY from IDispatch.
VarCyFromI2	This function converts variant data types to CURRENCY from short.
VarCyFromI4	This function converts variant data types to CURRENCY from long.
VarCyFromR4	This function converts variant data types to CURRENCY from float.
VarCyFromR8	This function converts variant data types to CURRENCY from double.
VarCyFromStr	This function converts variant data types to CURRENCY from OLECHAR.
VarCyFromUI1	This function converts variant data types to CURRENCY from BYTE.
VarDateFromBool	This function converts variant data types to DATE from BOOL.
VarDateFromCy	This function converts variant data types to date from CURRENCY.
VarDateFromDec	This function converts variant data types to DATE from DECIMAL.
VarDateFromDisp	This function converts variant data types to DATE from IDispatch.
VarDateFromI2	This function converts variant data types to DATE from short.
VarDateFromI4	This function converts variant data types to DATE from long.
VarDateFromR4	This function converts variant data types to DATE from float.
VarDateFromR8	This function converts variant data types to DATE from double.
VarDateFromStr	This function converts variant data types to DATE from OLECHAR.
VarDateFromUdate	This function packs a date.
VarDateFromUI1	This function converts variant data types to DATE from BYTE.
VarDecFromBool	This function converts variant data types to DECIMAL from BOOL.
VarDecFromCy	This function converts variant data types to DECIMAL from CURRENCY.
VarDecFromDate	This function converts variant data types to DECIMAL from DATE.
VarDecFromDisp	This function converts variant data types to DECIMAL from IDispatch.
VarDecFromI2	This function converts variant data types to DECIMAL from short.
VarDecFromI4	This function converts variant data types to DECIMAL from long.
VarDecFromR4	This function converts variant data types to DECIMAL from float.
VarDecFromR8	This function converts variant data types to DECIMAL from double.
VarDecFromStr	This function converts variant data types to DECIMAL from OLECHAR.
VarDecFromUI1	This function converts variant data types to DECIMAL from BYTE.
VarI2FromBool	This function converts variant data types to short from BOOL.
VarI2FromCy	This function converts variant data types to short from CURRENCY.
VarI2FromDate	This function converts variant data types to short from DATE.
VarI2FromDec	This function converts variant data types to Short from DECIMAL.
VarI2FromDisp	This function converts variant data types to short from IDispatch.
VarI2FromI4	This function converts variant data types to short from long.
VarI2FromR4	This function converts variant data types to short from float.
VarI2FromR8	This function converts variant data types to short from double.
VarI2FromStr	This function converts variant data types to short from OLECHAR.
VarI2FromUI1	This function converts variant data types to short from BYTE.
VarI4FromBool	This function converts variant data types to long from BOOL.
VarI4FromCy	This function converts variant data types to long from CURRENCY.
VarI4FromDate	This function converts variant data types to long from DATE.
VarI4FromDec	This function converts variant data types to long from DECIMAL.
VarI4FromDisp	This function converts variant data types to long from IDispatch.
VarI4FromI2	This function converts variant data types to long from short.
VarI4FromR4	This function converts variant data types to long from float.
VarI4FromR8	This function converts variant data types to long from double.
VarI4FromStr	This function converts variant data types to long from OLECHAR.
VarI4FromUI1	This function converts variant data types to long from BYTE.
VariantChangeType	This function converts a variant from one type to another.
VariantChangeTypeEx	This function converts a variant from one type to another, using a LCID.
VariantClear	This function clears a variant.
VariantCopy	This function frees the destination variant and makes a copy of the source variant.
VariantCopyInd	This function frees any existing content of the destination variant and makes a copy of the source VARIANT and VARIANTARG, performing the necessary indirection if the source is specified to be VT_BYREF.
VariantInit	This function initializes a variant.
VariantTimeToSystemTime	This function converts the variant representation of time to system time values.
VarNumFromParseNum	This function converts the parsed number to a number of the VARIANT and VARIANTARG type.
VarParseNumFromStr	This function parses a string and creates a type-independent description of the number it represents.
VarR4FromBool	This function converts variant data types to float from BOOL.
VarR4FromCy	This function converts variant data types to float from CURRENCY.
VarR4FromDate	This function converts variant data types to float from DATE.
VarR4FromDec	This function converts variant data types to float from DECIMAL.
VarR4FromDisp	This function converts variant data types to float from IDispatch.
VarR4FromI2	This function converts variant data types to float from short.
VarR4FromI4	This function converts variant data types to float from long.
VarR4FromR8	This function converts variant data types to float from double.
VarR4FromStr	This function converts variant data types to float from OLECHAR.
VarR4FromUI1	This function converts variant data types to float from BYTE.
VarR8FromBool	This function converts variant data types to double from BOOL.
VarR8FromCy	This function converts variant data types to double from CURRENCY.
VarR8FromDate	This function converts variant data types to double from DATE.
VarR8FromDec	This function converts variant data types to double from DECIMAL.
VarR8FromDisp	This function converts variant data types to double from IDispatch.
VarR8FromI2	This function converts variant data types to double from short.
VarR8FromI4	This function converts variant data types to double from long.
VarR8FromR4	This function converts variant data types to double from float.
VarR8FromStr	This function converts variant data types to double from OLECHAR.
VarR8FromUI1	This function converts variant data types to double from unsigned char.
VarUdateFromDate	This function converts a time and date converted from variant format to MS-DOS format.
VarUI1FromBool	This function converts variant data types to BYTE from BOOL.
VarUI1FromCy	This function converts variant data types to BYTE from CURRENCY.
VarUI1FromDate	This function converts variant data types to BYTE from DATE.
VarUI1FromDec	This function converts variant data types to BYTE from DECIMAL.
VarUI1FromDisp	This function converts variant data types to BYTE from IDispatch.
VarUI1FromI2	This function converts variant data types to BYTE from short.
VarUI1FromI4	This function converts variant data types to BYTE from long.
VarUI1FromR4	This function converts variant data types to BYTE from float.
VarUI1FromR8	This function converts variant data types to BYTE from double.
VarUI1FromStr	This function converts variant data types to BYTE from BSTR.
VectorFromBstr	This function returns a vector, assigning each character in the BSTR to an element of the vector.

See Also

Reference

Automation Reference