How to show progress in taskbar button?

Question

Please, can someone post an example how to show the progress in a taskbar button on Windows?

I've seen that the winapi crate seems to have support for this:

winapi::um::shobjidl_core::ITaskbarList

winapi::um::shobjidl_core::ITaskbarList4

But I have no idea how to use it.

Answer 1

With WinSafe crate things are a lot cleaner (and easier):

use winsafe::{self as w, co, shell};

let hwnd: HWND; // handle to your window, initialized somewhere

// Create the COM object.
let itbl: shell::ITaskbarList4 = w::CoCreateInstance(
    &shell::clsid::TaskbarList,
    None,
    co::CLSCTX::INPROC_SERVER,
).unwrap();

// Set the progress to 50%.
itbl.SetProgressValue(hwnd, 50, 100)
    .unwrap();

// Set the color to yellow.
itbl.SetProgressState(hwnd, shell::co::TBPF::PAUSED)
    .unwrap();