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adding_20an_20up-down_20control_20to_20the_20main_20window

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=====Adding an up-down control to the main window===== //by Richard Russell, May 2006//\\ \\ The BB4W help documentation describes how to add an **up-down control** to a dialogue box [[http://www.bbcbasic.co.uk/bbcwin/manual/bbcwing.html#updown|here]] but doesn't tell you how to add one to the main output window.\\ \\ The code below illustrates the creation of an up-down control which is 'attached' to an edit box, which is the usual way in which one is used. First install the necessary library:\\ \\ INSTALL @lib$+"WINLIB5" Next create the edit box to which the up-down control will be attached:\\ \\ WS_BORDER = &800000 ES_NUMBER = &2000 hedit% = FN_editbox("", 50, 50, 80, 20, 0, WS_BORDER + ES_NUMBER) Here the edit box is positioned at **50,50** and has a size of **80x20** pixels. The style value specifies that the box has a border and that it is a numeric-entry box.\\ \\ Now we can create the up-down control itself:\\ \\ UDS_SETBUDDYINT = 2 UDS_ALIGNRIGHT = 4 hupdown% = FN_createwindow("msctls_updown32", "", 0, 0, 0, 0, 0, \ \ UDS_ALIGNRIGHT + UDS_SETBUDDYINT, 0) The style value specifies that the up-down control is right-aligned in the edit box and that the edit box value is automatically modified by the up-down control.\\ \\ We must tell the up-down control to which edit box it is attached, over what range of values it operates, and what the initial value is:\\ \\ UDM_SETBUDDY = &469 UDM_SETRANGE = &465 UDM_SETPOS = &467 SYS "SendMessage", hupdown%, UDM_SETBUDDY, hedit%, 0 SYS "SendMessage", hupdown%, UDM_SETRANGE, 0, 50 SYS "SendMessage", hupdown%, UDM_SETPOS, 0, 20 Now we can access the contents of the edit box in the usual way, as documented [[http://www.bbcbasic.co.uk/bbcwin/manual/bbcwing.html#fneditbox|here]].\\ \\ Don't forget to delete both the edit box and the up-down control when you are finished:\\ \\ PROC_closewindow(hupdown%) PROC_closewindow(hedit%)

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adding_20an_20up-down_20control_20to_20the_20main_20window.1522502344.txt.gz · Last modified: 2018/03/31 14:19 by 127.0.0.1