Minimize Button Click Not Detected

https://github.com/dockpanelsuite/dockpanelsuite/blob/bb1246b6950b9a0c8ac24c3c22a1bc77af4a49e8/WinFormsUI/Docking/FloatWindow.cs#L197

On some setups, clicking the in lower left corner of the minimize button on the title bar will not be detected correctly. The result from the hit test will come back with a 2 indicating the title bar rather than an 8 for the minimize button. For the WM_NCLBUTTONDOWN message, the WParam included in the Message passed to WndProc should be used to determine where the click occurred. https://msdn.microsoft.com/en-us/library/windows/desktop/ms645620(v=vs.85).aspx

This line should be removed and the relevant part of the if statement on the next line should be changed to (uint)m.WParam == 2

[DanCarterGMSL]

I think the better fix would be the one suggested by @TheBobman03. This would mean the dragging code works as it should too.

[DanCarterGMSL]

The suggested solution by @mapper55 will minimize the window as soon as the left mouse button is pressed down. This is not how Windows usually works; normally it’s only on mouseup that the action is taken.

That said, if you change it to look at WM_NCLBUTTONUP instead, then clicking in the red region initiates a drag operation, whereas minimizing on mousedown doesn’t give time for that. The proper fix would be to use the correct hit test value for the drag operation too.