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Instruções de Operação HP, Modelo HP NonStop G-Series

Fabricante : HP
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Creating Client Applications
DDE Functions
output by the Bridge. (The Browser also allows you to use “cut and paste” to transfer
the DataElementName into your client application.)
You can subscript the DataElementName parameter with up to seven (7) subscripts
(starting at 1) if the data element is defined in the Tandem DDL as being in a table.
The Tandem DDE Gateway does no subscript limit checking (except to ensure that a
buffer is not overrun).
The DataElementValue should contain the value that you want converted and placed
in the Tandem DDE Gateway buffer. It must be in a clipboard format supported by a
data conversion function in the Tandem DDE Gateway. The data conversion functions
provided with the Tandem DDE Gateway support the CF_TEXT clipboard format in
which data consists of a string of characters terminated with a byte of binary zeros.
The Tandem DDE Gateway also supports a special clipboard format that allows you to
DDE Poke individual data elements into the Tandem DDE Gateway buffer without
any automatic data conversion being done. Use the registered clipboard format
TdmgwBinaryElement to DDE Poke the data item. The client application must
perform any necessary data conversions on the data before issuing the DDE Poke.
You can use the TdmgwBinaryElement clipboard format with any data element name
and the use of subscripts is permitted. Generally, registered clipboard formats cannot
be used with the DDE verbs built into client tools by their publishers and so you must
make calls to the Microsoft DDE Management Library (DDEML). Example client
applications using the DDEML are provided in the EXAMPLES\ subdirectory.
Register the TdmgwBinaryElement clipboard format for use in a client application by
making a Windows RegisterClipboardFormat call. Call RegisterClipboardFormat
during your client application's initialization logic with a single string parameter of
“TdmgwBinaryElement”. Use the 16-bit integer that is returned as the clipboard
format parameter in subsequent calls to the DDEML. RegisterClipboardFormat is in
the Windows USER library.
You can support additional clipboard formats by creating a User Hook Library. See
Section 8, “Extending the Tandem DDE Gateway,” for detailed information on how to
do this. For information on how data items are converted, see Section 6, “Data
Conversion.”
Areas of the buffer into which you have not placed data elements with DDE Poke
functions will contain binary zeros. (The buffer is initialized by the DDE Execute
function INITIALIZESERVICE command to binary zeros.)
If the DataElementValue starts and ends with double quotes (“ ”), they are removed
before the data is converted in the Tandem DDE Gateway buffer.
Provide DataElementValues for numeric data items in text with an optional decimal
point and leading sign. Leading zeros and insignificant trailing zeros are ignored. The
numeric string should not contain any commas, currency symbols, exponents, or other
non-numeric characters. Numeric data items are not validated by the Tandem DDE
Gateway; invalid data provided with the DDE Poke function causes invalid data (or no
data) to be placed in the Tandem DDE Gateway buffer.
4–8
110838 Tandem Computers Incorporated

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Este manual também é adequado para os modelos :
Computadores - HP NonStop L-Series (129.43 kb)

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