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VST host in C# newtownz23-Oct-07 4:32 newtownz 23-Oct-07 4:32  Hi, I have a problem with pinvoke in c# trying to create a VST host. A VST host is a little program able to use a dll which is actually an audio effect applicable on a wave file. The dll exports only one function : main. When you call this function it returns a pointer to a structure that lists the capabilities of the particular audio effect. My problem is that whatever I try, I just can't get the pointer that the dll is returning. I know that the call works because I supply a Delegate to the function which in turns calls the function in my program. Is there anyone out there who has tried something similar or who is a master of Interop who can help me on this topic? Jean Re: VST host in C# [modified] Baltoro25-Oct-07 10:39 Baltoro 25-Oct-07 10:39  A couple of months ago I wrote an application that acts as a host for the Cakewalk DXi Audio Plug In. The source is entirely different from the VST, but the Plug In concept is similar. Both the VST and the DXi are written as unmanaged COM Dlls (you know this, obviously). So, naturally, writing a host is alot easier in an unmanaged language. The easiest approach is to convert your VST Plug In to a NET assembly by using the Type Library Import Utility (tlbimp.exe[^]) shipped with SDK. This creates an assembly that you can then reference and use directly with your host application. A better approach would be to write your host in Unmanaged C++; sometimes the function types generated by the Type Library Import Utility are just too cumbersome to use easily. You might read this: Importing a Type Library as an Assembly[^]. I'm assuming that the VST DLL contains a type library. If not, you'll have to write your audio host in unmanaged C++ (unless you want to write your own Runtime Callable Wrappers, which is a very tedious and error-prone process; if you are a novice at Interop, I wouldn't recomment it). Good Luck. -- modified at 17:18 Thursday 25th October, 2007 Re: VST host in C# Obiwan Jacobi6-Sep-09 19:17 Obiwan Jacobi 6-Sep-09 19:17  http://vstnet.codeplex.com VST.NET allows you to write a VST host in managed code (C#/VB.NET). Check out the Host sample that is available. VST.NET will take care of all the marshaling between unmanaged and managed code so you do not need to call P/Invoke's. Note that VST.NET only supports VST 2.4. VST.NET also supports writing VST plugins. COM Component Shaileshvb23-Oct-07 0:02 Shaileshvb 23-Oct-07 0:02  while registering registry i am getting it is succeded but when i am going to search the CLSID of the same it doesnt gives...whats wrong here??? shailesh Re: COM Component charlieg23-Oct-07 4:48 charlieg 23-Oct-07 4:48  verify your search settings - specifically, shorten your search string.... Charlie Gilley Will program for food... Re: COM Component Prasann Mayekar24-Oct-07 2:22 Prasann Mayekar 24-Oct-07 2:22  Search by the guid u used for the component. Prasann who else Re: COM Component Arindam Tewary26-Oct-07 23:57 Arindam Tewary 26-Oct-07 23:57  Dear Shaileshvb, If you get it success while registering .... I guess you are trying to search the CLSID manually. If so ... then have tried searching it by selecting cmd --->RegEdit ---> Edit ---> Find ---> Enter the CLSID you are searching for .... Thanks, Arindam D Tewary VBScript to activeX to VBScript example needed - earn some beer charlieg22-Oct-07 11:40 charlieg 22-Oct-07 11:40  Name your price... as God is my witness, I hate anything to do with the web... I have an activeX control in VC++. I want to call it from VBScript. This activeX control has properties (they work fine). It also as get/set methods. The set's work fine. I cannot seem to find the right mojo to return a value from the activeX control... I know VBScript's calling convention is VARIANTs only. Fine. So, what arguments do I pick for my method so that I can return a value? In straight C++, I would pass by reference or by pointer. If I call from VBScript: DIM myInteger call myCtrl.getValue(myInteger) I want my C++ code to drop something into a data structure such that VBScript actually receives the results. Anyone willing to trade a code snippet for a case of beer? Flowers in the event you're a lady? Not to be sexist, but if you want the beer, I'm good with that too Charlie Gilley Will program for food... Re: VBScript to activeX to VBScript example needed - earn some beer CPallini22-Oct-07 21:46 CPallini 22-Oct-07 21:46  Since you need to use a script language, to obtain values from (as well to pass values to) the ActiveX control you need the control to implement the IDispatch interface (automation, my dear) and to use automation-compatible types as methods parameters. The following link point my article that shows how LicenceProvider COM component implements a method supporting automation [^]. The relevant code is inside LicProvider::Provide that you may find in the LicProvider.cpp source file. BTW if it helps, don't forget the beer! If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile. Re: VBScript to activeX to VBScript example needed - earn some beer charlieg23-Oct-07 4:56 charlieg 23-Oct-07 4:56  is pending Your article is written at too low a level for me. I'm up in mfc land, where much of this is wrapped in macros. I do understand your comment about the IDispatch interface / automation. The data comes in just fine. I just cannot return anything through a method argument. For example: void control::getRandomInt(int seed, ??? RandomInt) Now, true/false? VBScript always passes by Variant. In the header files, we find VT_ types throughout, so I would conclude that we are passing using an automation interface. I would also conclude that there is some magic going on as well, since the values I receive in the actual methods are the primitive types I've come to love and respect. Note that in my debug code, I can see the "seed" value come in correctly. The questions I have involve the RandomInt type. Since I'm returning a value, in C++ I would specify by reference or by pointer. But nothing ever comes back to the VBScript side of the world. And I *will* ship the when I get this fixed. Charlie Gilley Will program for food... Re: VBScript to activeX to VBScript example needed - earn some beer CPallini23-Oct-07 8:11 CPallini 23-Oct-07 8:11  Since you're using MFC, maybe worthy a look at http://msdn2.microsoft.com/en-us/library/95357zak(VS.80).aspx[^] Bottom line, if it is useful, send the beer to Mummy Microsoft! If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile. Re: VBScript to activeX to VBScript example needed - earn some beer Vi229-Oct-07 18:44 Vi2 29-Oct-07 18:44  If your "getValue" method has [retval] attribute, you can write: DIM myInteger<br /> myInteger = myCtrl.getValue<br /> With best wishes, Vita Re: VBScript to activeX to VBScript example needed - earn some beer charlieg1-Nov-07 1:06 charlieg 1-Nov-07 1:06  Vita, Yes, thank you, I know this. But what I want to know is how to do this (example): DIM nStatus DIM nWhatever nStatus = myCtrl.DoSomething(nWhatever) and .DoSomething returns a value in nWhatever.... chg Charlie Gilley Will program for food... Re: VBScript to activeX to VBScript example needed - earn some beer Vi21-Nov-07 5:50 Vi2 1-Nov-07 5:50  It's possible for VBScript, for example, but is never possible for JScript. 1) [out] parameter should be VARIANT*. 2) else there should be the Invoke handler be able to convert VARIANT with VT_VARIANT|VT_BYREF to obtain any type. I didn't met such default handlers. With best wishes, Vita DocumentComplete and reload conman11022-Oct-07 8:04 conman110 22-Oct-07 8:04  Hello, I developed a simple browser helper object in VC++ as an ATL project which listens for the DocumentComplete event of the DWebBrowserEvents2 interface. When testing it I discovered that this event is not fired if the user presses the reload button. Why is that? And what is the proper event which is fired, when the document is loaded and is fired again, when the document is reloaded? Thanks for your attention. Constantin Re: DocumentComplete and reload conman11022-Oct-07 8:23 conman110 22-Oct-07 8:23  I found an article covering this problem: http://www.codeproject.com/internet/detecting_the_ie_refresh.asp[^] Re: DocumentComplete and reload shivditya22-Oct-07 19:56 shivditya 22-Oct-07 19:56  I found article is using CCmdTarget for finding sink. I am actually in similar problem,where I am trying to monitor IE with help of toolbar, so I am using pure atl,com and not mfc.So what is alternative way to monitor events.Or I have to in similar way. I have IWebBrowser2 object in my hand. || ART OF LIVING || Re: DocumentComplete and reload conman11023-Oct-07 20:57 conman110 23-Oct-07 20:57  I included the technique described in this article and found out that it works under most circumstances but not all: The event pair DownloadBegin/DownloadComplete which is used to detect the refresh of the page gets also trigged if the page uses a remote scripting technique. So we would get a false alarm each time the page appends a script node to the DOM. I played around with another Add-on (the Snap Shot Add-On from www.snap.com) and found out, that it somehow gets DocumentComplete to be triggered if the user presses the pages refresh button. But how do they do that? And is there maybe a reason that DocumentComplete isn't called when the page reloads? Best regards Constantin displaying the ActiveX Composite control theCPkid22-Oct-07 7:48 theCPkid 22-Oct-07 7:48  I created a dialog-based MFC applicatioon using wizard and then I added a ActiveX composite control implemented in CMyControl class by adding ATL support to my MFC application. and it added a IDD_MyCOntrol dialog to application. I want to display this composite control dialog. By default, MFC creates an instance of dialog class and use DoModal on that dialog. I removed that part from InitInstance() and wants to add something like CComCompositeControl::Create or CreateWindow.. etc which can display that composite control dialog box. How can I do that as I am not able to get the instance of CMyControl class since simply using new is not allowed as compiler gives an abstarct class error etc I tried to get the instance of CMyControl class using CComObject but then could not get the pointer to CComCompositeCOntrol class so that I could use create function. Any idea how to display that composite control dialog box??? it looked easy to me. anny suggestions? links? sample code? PS: really dont expect any answer to such a badly written question. m just tired Re: displaying the ActiveX Composite control theCPkid28-Oct-07 6:42 theCPkid 28-Oct-07 6:42  lol! never mind. i was just tired that night. i was trying to badly mix the MFC and ATL and forgot where one ends and another begins. Composite Control is specifically in ATL and 'Create' should work for it for displaying it. In MFC, I just had to use my activeX control on the default dialog Box provided by MFC dialog based appln. I did not require to use composite control for hadnling that activeX control...i dont know from where i got the idea to use ATL. anyway, thx all. Re: displaying the ActiveX Composite control manish.patel25-Mar-08 22:28 manish.patel 25-Mar-08 22:28  Hey I have also same kind of the problem and i am not able to add variable for activex control(Shockwaveflash). Any hint on how to add variable to this control? Thanks in advance Manish Patel. B.E. - Information Technology. Re: displaying the ActiveX Composite control theCPkid25-Mar-08 23:03 theCPkid 25-Mar-08 23:03  Are you trying to add activeX control inside MFC application? I have not got any error while attaching a variable to shockwave activeX control. I simply added a shock wave flash object inside a MFC application and then using class wizard, attached a variable to it - a CShockwaveFlash object. Are you able to include the CShockwaveFlash class? If yes, then there should not be any problem in instantiating it. Please write the error you are getting in detail. BTW my problem was different and not related to adding variable to activeX control. Thanks. Re: displaying the ActiveX Composite control manish.patel25-Mar-08 23:08 manish.patel 25-Mar-08 23:08  Thanks for your kind reply. I am adding ShockwaveFlash activex in ATL Dialog not in MFC dialog, because my applicaion is for Outlook Addin and it is unable to display MFC Dialog(It only Display ATL Dialog). I am able to add ShockwaveFlash in Desin view but unable to asign variable to it. Any Idea? Manish Patel. B.E. - Information Technology. embedding WMP and changing it's skin H.R21-Oct-07 10:07 H.R 21-Oct-07 10:07  hi I want to embed the Windows Media Player to my C# win app I did it successfully. and I know that for changing it's skin, have to use of 'IWMPRemoteMediaServices.GetCustomUIMode' method. but I can not find this method at all. I do not know how can select a desired skin for my WMP object in my application. anybody help me ?! H.R Register browser helper object conman11019-Oct-07 5:28 conman110 19-Oct-07 5:28  Hello, I wrote a simple Broser Helper Object as an ATL COM component which works just fine when running it from Visual Studio or registering it with regsvr32. Also I created a setup project for deployment of the BHO. What I would like to know is what I need to do in my setup project so the DLL file is registered correctly and becomes executed when the Internet Explorer starts. Does someone know which steps I must process exactly? Thanks!! Constantin

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