Callback used to check if specific key is down in this platform.
Keys to check
true if the specified key(s) is down; otherwise, false.
This callback is used by the annotations core library to determine whether a specific key is currently down. Since Leadtools.Annotations.Engine is platform-independent, this callback must be set through the platform-specific automation object.
Medical Web Viewer .NET
.NET, Java, Android, and iOS/macOS Assemblies
C API/C++ Class Libraries