Palm OS开发常见问题和技巧

　　1. 判断当前focus是否为field

　　index=FrmGetFocus(form);

　　if(index= =noFocus)

　　return(false);

　　field=FrmGetObjectPtr(form,index);

　　2. FrmDoDialog()使用方法：

　　FrmInitForm

　　FrmDrawForm

　　set form controls

　　FrmDoDialog

　　read form controls

　　FrmDeleteForm

　　注意：FrmDoDialog()无法获得frmOpenEvent。

　　3. 测试控件类型：

switch (FrmGetObjectType(pForm, index)) {
　 case frmControlObj:
　　
　 case frmFieldObj:
　　
　 case frmScrollBarObj:
　　
　 default:
　　
}

　　4. 在程序里使用标准的edit menu:

　　If your form has a menubar that consists of just the "Edit" menu, you can specify menu ID 10000 at form creation time. If your form has a menubar with several menus, you should specify your Edit menu like this, using PilRC notation:

PULLDOWN "Edit"
BEGIN
　　MENUITEM "Undo" ID 10000 "U"
　　MENUITEM "Cut" ID 10001 "X"
　　MENUITEM "Copy" ID 10002 "C"
　　MENUITEM "Paste" ID 10003 "U"
　　MENUITEM "Select All" ID 10004 "S"
　　MENUITEM "-" ID 10005
　　MENUITEM "Keyboard" ID 10006 "K"
　　MENUITEM "Grafitti Help" ID 10007 "G"
ENDIf you're using Constructor, just create an Edit menu with ID 10000, and the IDs for the items will be provided for you. http://www.palmoswerks.com/2001/11/16