When using textboxes in the user interface, I think that most users automatically think that the mouse wheel can be used to scroll this textbox up and down (so would I). So I wrote a piece of code that I now include in all my projects to support this request. It's actually quite simple. For each panel that gets loaded, I use the InstallWinMsgCallback function, with the MessageNumber parameter set to WM_MOUSEWHEEL.

Important note: for WM_MOUSWHEEL to be defined, windows.h should be included, and WIN32WINNT should be at least defined to 0x0400. To make sure this last definition is made, open the Build Options window (can be found in the Options menu), and enter /D_WIN32_WINNT=0x0400 in the "Compiler Defines" field.

I attached an example program to this message, which shows how to enable textbox scrolling with the mouse wheel in a very simple way. More information on the WM_MOUSEWHEEL message number can be found in the MSDN library:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/win dowsuserinterface/userinput/mouseinput/mouseinputreference/mouseinputmessages/wm _mousewheel.asp

I hope this post is usefull for at least some of you guys

MouseWheel.zip (4 kb)

Posted by Wim S

Original forum post: http://forums.ni.com/ni/board/message?board.id=180&message.id=28367#M28367

A few accelerators are present in the IDE that can help a lot in developing applications.

Everybody knows that in the UIR editor right-clicking on a control popups a menu by which it's possible to jump directly to control's callback (item "View control callback").

The symmetric action from a source code window is to place the cursor on a control name and press Ctrl-F: you will jump into the UIR editor window with the stated control already selected. This option is equivalent to right-clicking on the control name and select "Find UI object" option).

I recently discovered that this option is present on callback function names too: selecting the function name and pressing Ctrl-F jumps me to the UIR editor window If the function is associated to more controls, a popup window will be shown with the list of controls for we to select the desired control to select.

Posted by Roberto Bozzolo