Hp NonStop G-Series Bedienungsanleitung PDF herunterladen (Seite 115)

User Hook Library

Extending the Tandem DDE Gateway

110838 Tandem Computers Incorporated 8–13

Prototype

BOOL FAR PASCAL TdmgwHookGetRequestDdeSize

(HWND hMainWnd, in

unsigned long ulInitializeServiceSerialNumber, in

LPSTR lpServiceName, in

struct tagDdeDictElementData far * pstructElementData, in

WORD cfFormat, in

unsigned int far * puRequestElementDdeSize, in/out

struct tagTdmgwErrorMsg far * pstructErrMsg); out

Parameters

Return Value Zero = Error.

Non-zero = No error.

hMainWnd Window handle of Tandem DDE Gateway main

window.

ulInitializeServiceSerialNumber Number incremented with each

INITIALIZESERVICE command. Starts at zero

when the Tandem DDE Gateway is started.

Rolls over to zero after 4,294,967,295.

lpServiceName Current ServiceName object (from

INITIALIZESERVICE command).

pstructElementData Description of current data element. (See the

“Tandem DDE Gateway Dictionary Structure”

topic).

cfFormat Clipboard format of DDE Request function.

puRequestElementDdeSize Size of the data area to store the data converted

from the Tandem data representation to the

clipboard format cfFormat.

pstructErrMsg See “Returning Error Messages” earlier in this

section.

TdmgwHookIsConvSupported

This function may be called when your client application does an element-by-element

DDE Request or DDE Poke function.

You must enable the function with TdmgwHookEnableUserHooks function by

returning a value with the TDMGW_HOOK_ENABLE_IS_CONV_SUP bit set.

On entry, pbSupportedFormat will contain a non-zero value if the built-in automatic

data conversion functions can convert between the clipboard format cfFormat and the

required Tandem data representation. The parameter pbSupportedFormat contains

zero if there is no built-in automatic data conversion.

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Hp NonStop G-Series Bedienungsanleitung Seite 115