Close that UI.
Get the current plugin UI size in logical pixels.
Used by VST3.
Used by VST3.
Used by VST3.
Used by VST3. Tells the native window to resize itself. Called by the host when it's one resizing the parent window, and wants our window to follow suit. This is to be forwarded to IWindow.
Create an UI, return a system-specific handle for the window/view
Plugin GUI