shift key states accessed at wrong time

When using shift keys (ie Shift, Ctrl, and Alt), their state is picked up at the wrong time.

Suppose I press Shift+X to get capital X. The status of Shift should be picked up when X is entered. Instead it appears to be picked up when X is removed from the message queue.

There can be a delay between the entry of the key and its removal from the queue, especially (eg) when running ReactOS under Sun VirtualBox. Because of this delay, the user must continue to hold down the Shift key until the X key is processed, otherwise he gets X in lower case.

This does not match the behaviour in Windows, and it makes keyboard input unpredictable if a system is running slowly.