Here is a function that given a type library it will populate a string list with all the referenced type libraries.
procedure GetTypeLibraryReferences(const FileName: string;
References: TStrings);
function IndirectionTypeDesc(TypeDesc: PTypeDesc): PTypeDesc;
begin
Result := TypeDesc;
while Result <> nil do
begin
// Follow pointer type to pointed to type.
if Result.vt <> VT_PTR then
Break;
Result := Result.ptdesc;
end;
end;
procedure GetTypeLibName(const TypeInfo: ITypeInfo; RefType:
HRefType; References: TStrings);
var
CustomTypeInfo: ITypeInfo;
CustomTypeLib: ITypeLib;
Index: Integer;
Guid: TGuid;
CustomLibAttr: PTLibAttr;
TypeLibName: WideString;
begin
OleCheck(TypeInfo.GetRefTypeInfo(RefType, CustomTypeInfo));
OleCheck(CustomTypeInfo.GetContainingTypeLib(CustomTypeLib, Index));
// Get the name and guid of the type library that contains this type.
OleCheck(CustomTypeLib.GetLibAttr(CustomLibAttr));
try
OleCheck(CustomTypeLib.GetDocumentation(MEMBERID_NIL,
@TypeLibName, nil, nil, nil));
References.Add(Format('%s - %s',
[TypeLibName, GuidToString(CustomLibAttr.guid)]));
finally
CustomTypeLib.ReleaseTLibAttr(CustomLibAttr);
end;
end;
var
TypeLib: ITypeLib;
TypeInfoIndex: Integer;
Kind: TTypeKind;
TypeInfo: ITypeInfo;
TypeAttr: PTypeAttr;
FuncDescIndex: Integer;
FuncDesc: PFuncDesc;
ParamsIndex: Integer;
ElemDesc: PElemDesc;
TypeDesc: PTypeDesc;
ImplTypesIndex: Integer;
RefType: HRefType;
begin
OleCheck(LoadTypeLibEx(PWideChar(WideString(FileName)), REGKIND_NONE, TypeLib));
// Get the CoClasses, interfaces, enums, modules dispinterfaces,
// alias', unions and records.
for TypeInfoIndex := 0 to TypeLib.GetTypeInfoCount - 1 do
begin
TypeLib.GetTypeInfoType(TypeInfoIndex, Kind);
TypeLib.GetTypeInfo(TypeInfoIndex, TypeInfo);
OleCheck(TypeInfo.GetTypeAttr(TypeAttr));
try
case Kind of
TKIND_COCLASS:
begin
// Get the implemented interfaces.
for ImplTypesIndex := 0 to TypeAttr.cImplTypes - 1 do
begin
OleCheck(TypeInfo.GetRefTypeOfImplType(ImplTypesIndex,
RefType));
GetTypeLibName(TypeInfo, RefType, References);
end;
end;
TKIND_INTERFACE, TKIND_DISPATCH:
begin
for FuncDescIndex := 0 to TypeAttr.cFuncs - 1 do
begin
OleCheck(TypeInfo.GetFuncDesc(FuncDescIndex, FuncDesc));
try
// Item 0 is the method name. Ignore it
// for the parameter list.
for ParamsIndex := 1 to FuncDesc.cParams do
begin
ElemDesc := @FuncDesc.lprgelemdescParam[ParamsIndex - 1];
TypeDesc := IndirectionTypeDesc(@ElemDesc.tdesc);
if TypeDesc.vt = VT_USERDEFINED then
begin
RefType := TypeDesc.hreftype;
GetTypeLibName(TypeInfo, RefType, References);
end;
end;
finally
TypeInfo.ReleaseFuncDesc(FuncDesc);
end;
end;
end;
end;
finally
TypeInfo.ReleaseTypeAttr(TypeAttr);
end;
end;
end;