how to use functions to change the default Zoom out on GRAPH?

[winter1970]

i have know that one can use CTRL+Rightkey to ZOOM out on GRAPH control.

But，i have used EVENT_RIGHT_CLICK to display some menus.

When i press CTRL+Rightkey to ZOOM out on graph,i found it also trigger the menu display.

SO, i want to find some ways to change the default ZOOM out on GRAPH( CTRL+Rightkey)

[carmen9]

https://knowledge.ni.com/KnowledgeArticleDetails?id=kA00Z0000019NPpSAM&l=en-US

[winter1970]

我用中文说一遍： 已知CTRL+鼠标右键可以用来缩小GRAPH控件，同时我在回调函数中设置了当按下鼠标右键时，会弹出一个菜单；可是当我在使用CTRL+Rightclick缩小GRAPH控件的图形时，也会同时触发显示回调函数中定义的右键菜单，这该怎么解决？有什么办法可以重新定义GRAPH缩小的快捷键或其他解决办法？

[carmen9]

Perhaps you can use other keys to display menu instead of EVENT_RIGHT_CLICK?

http://zone.ni.com/reference/en-XX/help/370051AG-01/cvi/usermanual/prjoptshortcutkeys/

http://zone.ni.com/reference/en-XX/help/370051V-01/cvi/uiref/cvieventkeypress/

[winter1970]

我有一个想法，分析GRAPH控件的ZOOM OUT操作，即 press Ctrl-key first，hold on，then click right-key of mouse . 这样就可以ZOOM OUT；

如果当Ctrl-key 按下后，我能检测到，那么我就可以在程序中判断到这种情况，就可以避免冲突。

那么有什么办法可以检测到按下Ctrl-key?

GetKeyPressEventModifiers函数only detect "modifier +ASCII";

can any other functions be used to detect only "modifier key" pressed?

[winter1970 · Accepted solution]

我找到方法了，使用GetGlobalMouseState()获取modifiers key，然后判断。