Yes I tried with the mentioned PluginMessage ids but I tried only on C4DPL_PROGRAM_STARTED and it stopped working so I thought the other will not work as well.
I tried C4DPL_COMMANDLINEARGS now and this one only seems to work for me.
Thank you :)

I tried the code that you have tested but I am still having the same problem. As I have mentioned in the beginning the layout does load but then Cinema4D stops working (Not Responding)

Thank you @m_magalhaes

Hello @m_magalhaes
I am putting the code under C4DPL_BUILDMENU.

case C4DPL_BUILDMENU:     
{
   Filename file = Filename("C:/Program Files/MAXON/Cinema 4D R20 
   Education/library/layout/myLayout.l4d");
   LoadFile(file);
   break;
}

I am using R20.028 but I don't think this changes anything. Maybe I am just putting the code on the wrong place.
Thank you

Hello,
I am creating a CUSTOMGUI_CYCLE with my own attributes using getDDescription function. Everything goes fine until the point where I want to change the selected item. Assume that I have the following code, the Item with id 0 will be selected by default. Is there any way that I can change this? Like after a specific action the Item 1 will be selected? I tried many things but I could not find the right one. the .SetInt32(Id,value) method does not seem to work for this case as well.I also tried GetDParameter and other possible ways to do this but still could not solve this.

  BaseContainer settings = GetCustomDataTypeDefault(DTYPE_LONG);
  settings.SetString(DESC_NAME, "Drop Down"_s);
  settings.SetInt32(DESC_CUSTOMGUI, CUSTOMGUI_CYCLE);
  // add cycle elements
  BaseContainer items;
  items.SetString(0, "Item 1"_s);
  items.SetString(1, "Item 2"_s);
  items.SetString(2, "Item 3"_s);
  settings.SetContainer(DESC_CYCLE, items);

Thank you.

Hello,
I am trying to load a layout (.l4d file extension) using LoadFile() function but when I do this the Cinema4D will open with the loaded layout active, and then stop working. when I try to load other files like .c4d it loads them correctly.
Am I doing something wrong here or is there another way to do this?
Thank you.

Hello @m_adam
I see, I will have to use one of the other alternatives then.
Thank you.

Hello,
I need to customize Cinema4D's interface by redesigning it's layout and palettes. Customizing Menus seems to have some hints on the documentation on how to do it but for the commands it doesn't seem so or maybe I am just not finding it. I can just redesign it using drag and drop feature from the Customize Commands dialog but I need to do this using Maxon API.

Is there any way on how I can do this?
Thank you in advance.

Hello,
I am trying to find a way on how to get the nodes that are connected to a node-based material like we find the shaders connected to a standard material's texture. So is the same thing possible for the node-based material?
Also does these materials ex (car paint, ceramic etc) have a corresponding .h header file like other shaders do?
Thank you.

Hello,
I know that for the BaseMaterial we can find which shader is applied to color's texture or diffusion's texture and so by using a BaseContainer
(basecontainer->GetLink(MATERIAL_COLOR_SHADER, doc)) or a GeData by using GetParameter() function.
Can we do the opposite of this. By traversing through all the shaders to find in which parameter(color,diffusion,luminance...) of a material each shader is used.
Thank you.