IContextMenu.InvokeCommand() no longer works asynchronous on Windows 7

Question

Hi there.

I used to execute shell operations like copy, paste or delete on files and folders using IContextMenu.InvokeCommand() in my application for years. Usually these operations were executed asynchronously, but on Windows 7 InvokeCommand() is blocking my application while the operation is executed. I verified that the same executebale behaves differently on Windows XP, here the Windows Shell seems to spin off a seperate thread for the operation. Adding CMIC_MASK_ASYNCOK to CMINVOKECOMMANDINFO.fMask does not make any difference.

Does anybody know a trick how to get back the old async behavior of Windows XP also on Windows 7?

Best regards,

Joachim

Answer 1

I have the same issue.

In my InvokeCommand code I create a new process with CreateProcess() but I cannot get the contextual menu on an another file during the execution.

Explorer hangs until the end of my process.

My code is based on this example :
http://www.codeproject.com/KB/shell/shellextguide1.aspx

Please post if you have a solution. :)