perform(WM_NEXTDLGCTL,0,0); 是什么意思？WM_NEXTDLGCTL,0,0是什么意思？perform是干什么的？(0分)

谢了！

Call Perform to bypass the Windows message queue and
send a message directly to the control’s window procedure.

The WM_NEXTDLGCTL message is sent to a dialog box procedure to
set the keyboard focus to a different control in the dialog box.

wCtlFocus = wParam
// identifies control for focus
fHandle = (BOOL) LOWORD(lParam)
// wParam handle flag


All is in Delphi Help. brother, pls check it first, then post the notice

让下一个控件获得输入焦点的，数据录入界面中很有用。