Question

The IDM offers some API for client applications : http://www.internetdownloadmanager.com/support/idm_api.html

How can I do this via Delphi?

Answer 1

ok. let suppose we have IDM installed.

seems IDManTypeInfo.tlb library does not contain information about data types of IDM library.
In this case, the only way to use this library is to rewrite c++ header files to Delphi:

unit IDMan;

interface
uses windows, ActiveX;

const
    CLSID_CIDMLinkTransmitter : TGUID = '{AC746233-E9D3-49CD-862F-068F7B7CCCA4}';

    IID_ICIDMLinkTransmitter  : TGUID = '{4BD46AAE-C51F-4BF7-8BC0-2E86E33D1873}';
    IID_ICIDMLinkTransmitter2 : TGUID = '{94D09862-1875-4FC9-B434-91CF25C840A1}';
type
    ICIDMLinkTransmitter = interface(IInterface)
        ['{4BD46AAE-C51F-4BF7-8BC0-2E86E33D1873}']

        function SendLinkToIDM(
            Url : WideString;
            Referer : WideString;
            Cookies : WideString;
            Data: WideString;
            User: WideString;
            Password: WideString;
            LocalPath: WideString;
            LocalFileName: WideString;
            Flags : longint):HRESULT; stdcall;
    end;

    ICIDMLinkTransmitter2 = interface(ICIDMLinkTransmitter)
        ['{94D09862-1875-4FC9-B434-91CF25C840A1}']
        function SendLinkToIDM2(
            Url : WideString;
            Referer: WideString;
            Cookies: WideString;
            Data: WideString;
            User: WideString;
            Password: WideString;
            LocalPath: WideString;
            LocalFileName: WideString;
            Flags : longint;
            reserved1 : Variant;
            reserved2 :Variant): HResult; stdcall;

        function SendLinksArray(
            location : WideString;
            LinksArray : PSafeArray):HResult; stdcall;
    end;

implementation

end.

add this unit to your project and try to use the next code:

uses IDMan, ComObj;
....
procedure TMainForm.TestIDM();
var lt : ICIDMLinkTransmitter;
begin
    lt := CreateComObject(CLSID_CIDMLinkTransmitter) as ICIDMLinkTransmitter;
    lt.SendLinkToIDM('http://www.internetdownloadmanager.com/trans_kit.zip', 'teran.karelia.pro','','','','','','', 0);
end;

I have no IDM installed, so I didn’t check this code. I’m not sure it is 100% correct, but try it.