WMDeviceChange

[pipy71]

I have nrDeviceBox on a form

I am having trouble getting the list of available com ports to update correctly when I remove a USB port.

Plugging in a new USB to serial com port works fine, its detected and shows in the nrDeviceBox correctly.

However when the USB device is unplugged from computer the removed port still shows in the nrDeviceBox!

What's the correct method for updating the nrDeviceBox when using WMDeviceChange so that removed ports don't show any more?

Thanks

[Roman Novgorodov]

Hello

You can call nrComm.Update method

Roman Novgorodov
DeepSoftware.Com

[pipy71]

Hello

I have tried but it wont remove the com port from the nrDeviceBox1 list when I unplug the USB cable..

Code Select Expand



public
    { Public declarations }
    procedure WMDeviceChange(var Msg:TMessage); message WM_DEVICECHANGE;
  end;

procedure MyViewer.WMDeviceChange(var Msg: TMessage);
begin
  nrDeviceBox1.clear;
  nrComm1.WMDeviceChange(Msg);
  nrComm1.update;
  nrcomm1.DeviceIndex := 0;



Regards

[Roman Novgorodov]

Hello

Please check that nrComm.EnumPorts is epFullPresent value.

Roman Novgorodov
DeepSoftware.Com