>Hi,All!J use by "Wait Window" command to displays the message in a system message window.How may J change it's font(J want to set BOLD)?
>Thanks.

This font for the wait window is controlled by the settings for the font used for the Windows Message Box. It is not under VFP control and, if you change it you will change ALL message boxes in all applications on the User's machine (not a very nice thing to do to them).

However, if you must do it, there is a Knowledgebase article on the subject:
Q181944
HOWTO: Use API Functions to Retrieve System Font Information