IPB_Session interface:
GetClass method
Description
Returns the class handle of a PowerBuilder object. This function is most frequently used to obtain a class handle for use with the GetMethodID function.
Syntax
GetClass (pbobject obj)Argument |
Description |
|---|---|
obj |
A valid PowerBuilder object handle |
Return Values
pbclass or null on error.
Examples
In this example, GetClass is used to obtain the class of a variable of type UserData so that the class can be used as an argument to the GetMethodID 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;
}