Ankush Murkute
asked on
olevarient parameter throws exception passing to .type libaray com object in delphi.
I have generated .type library from some .dll which com dll.
//procedure TMDF4Reader.GetData(bTime: Integer; lFirstIndex: Integer; lLastIndex: Integer;
out pBuffer: OleVariant; out nValuesRead: Integer);
begin
DefaultInterface.GetData(b Time, lFirstIndex, lLastIndex, pBuffer, nValuesRead);
end;
this function from .tlb file.
I want to call this function but this function does not accept olevarient.
I tried following way
var
vData : olevarient;
vData := VarArrayCreate([0,0], varDispatch); // A Variant array
boun.cElements := 1;
boun.lLbound := 0;
SafeArray := SafeArrayCreate(VT_DISPATC H, 1, @bounds);
if SafeArray <> nil then
begin
TVarData(vData).VType := (VT_ARRAY or VT_VARIANT or VT_DISPATCH);
TVarData(vData).VArray := PVarArray(SafeArray);
end;
MDF4.GetData(1, 1, 10, &vData, &n); // Get the data form the time signal
please help me on this i stuck
//procedure TMDF4Reader.GetData(bTime:
out pBuffer: OleVariant; out nValuesRead: Integer);
begin
DefaultInterface.GetData(b
end;
this function from .tlb file.
I want to call this function but this function does not accept olevarient.
I tried following way
var
vData : olevarient;
vData := VarArrayCreate([0,0], varDispatch); // A Variant array
boun.cElements := 1;
boun.lLbound := 0;
SafeArray := SafeArrayCreate(VT_DISPATC
if SafeArray <> nil then
begin
TVarData(vData).VType := (VT_ARRAY or VT_VARIANT or VT_DISPATCH);
TVarData(vData).VArray := PVarArray(SafeArray);
end;
MDF4.GetData(1, 1, 10, &vData, &n); // Get the data form the time signal
please help me on this i stuck
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I'd call it as
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If you pass pBuffer as out then any value sored there will be cleared