IPB_Session interface:
InvokeClassFunction method
Description
Invokes system or user global functions.
Syntax
InvokeClassFunction(pbclass cls, pbmethodID mid, PBCallInfo *ci)
Argument |
Description |
|---|---|
cls |
The class that contains the global function. If this is a system function, cls is obtained with GetSystemFunctionsClass; otherwise, it is obtained with FindGroup and FindClass, with the function name as the group/class name. |
mid |
The pbMethodID returned by GetMethodID. |
ci |
A pointer to a preallocated PBCallInfo structure. |
Return Values
PBXRESULT. Returns PBX_OK for success, or one of the following for failure:
PBX_E_INVALID_ARGUMENT
PBX_E_INVOKE_METHOD_INACCESSABLE
PBX_E_INVOKE_WRONG_NUM_ARGS
PBX_E_INVOKE_REFARG_ERROR
PBX_E_INVOKE_METHOD_AMBIGUOUS
PBX_E_INVOKE_FAILURE
PBX_E_INVOKE_FAILURE
Examples
This example gets the PowerBuilder system class and uses it to invoke the double function:
cls = session-> GetSystemClass();
mid = session-> GetMethodID
(cls, "double", PBRT_FUNCTION, "DA");
session-> InitCallInfo(cls, mid, ci);
ci->pArgs -> GetAt(0) -> SetPBString(mystr);
session -> InvokeClassFunction(cls, mid, ci);
Usage
On return, this method allocates enough spaces for the arguments, and then initializes arguments and return value. You must set appropriate values in the PBCallInfo structure. Note that the structure itself must have been allocated before the call.