IPB_Session interface:
GetMethodID method
Description
Returns the ID of the requested method.
Syntax
GetMethodID(pbclass cls, LPCTSTR methodName, PBRoutineType rt, LPCTSTR signature, pbboolean publicOnly)
Argument
|
Description
|
|---|
cls
|
pbclass containing
the function.
|
methodName
|
The string name of the method in lowercase.
|
rt
|
Type of the method: PBRT_FUNCTION
for function or PBRT_EVENT for event.
|
signature
|
Internal signature of the PowerBuilder
function, used to identify polymorphic methods in one class. Obtained
with the pbsig170 tool. If the signature is a null string
(" "), the first method found with the name methodName is
returned.
|
publicOnly
|
A boolean that determines whether only
public methods are searched (true) or all methods
are searched (false). The default is true.
|
Return Values
pbMethodID of the method or kUndefinedMethodID on
error.
Examples
This function uses GetMethodID to
obtain the identifier (mid) of the onnewfont function
so that the identifier can be used to initialize the PBCallInfo
structure and call the function:
BOOL CALLBACK CFontEnumerator::EnumFontProc
(
LPLOGFONT lplf,
LPNEWTEXTMETRIC lpntm,
DWORD FontType,
LPVOID userData
)
{
UserData* ud = (UserData*)userData;
pbclass clz = ud->session->GetClass(ud->object);
pbmethodID mid = ud->session->GetMethodID(clz,
"onnewfont", PBRT_EVENT, "IS");
PBCallInfo ci;
ud->session->InitCallInfo(clz, mid, &ci);
pbstring str = ud->session->
NewString(lplf->lfFaceName);
ci.pArgs->GetAt(0)->SetPBString(str);
ud->session->TriggerEvent(ud->object, mid, &ci);
pbint ret = ci.returnValue->GetInt();
ud->session->FreeCallInfo(&ci);
return ret == 1 ? TRUE : FALSE;
}
Usage
The GetMethodID function is used to obtain
the ID of a method so you can use it to invoke functions and trigger
events.
See Also