Automation Functions
The following table shows the Automation functions with a description of the purpose of each.
| 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 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 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
Last updated on Wednesday, April 13, 2005
© 2005 Microsoft Corporation. All rights reserved.