Use the toggle button to simulate the Ctrl key now

Hello

I saw someone asked something very similar before, but nobody seemed to know the solution.

I was wondering if it is possible to use a toggle button to simulate the CTRL key now, the idea being that the user could then zoom in on a rectangle of their choice on a field without having to press the button themselves. I know that you can use the FakeKeystroke function to simulate support that the key however is possible that it may be held?

Thank you

I forgot one thing. You must handle the case when you have a real EVENT_DOUBLE_CLICK. In this case, you don't want to reset the keyboardState. Here's the modified code.

char oldKeyState [256] = {0};

char newKeyState [256] = {0};

int isFakeDouble = 0;
Zoom CVICALLBACK int (int, int int event, control panel,

		void * callbackData, int eventData1, int eventData2)

{

	HWND hwnd;

	toggleButton int = 0;

	switch (event)

	{

		case EVENT_LEFT_CLICK:
get the current state of the keyboard

			GetKeyboardState (oldKeyState);

			get the State of the toggle button

			GetCtrlVal (panelHandle, PANEL_TOGGLEBUTTON, & toggleButton);
If (ToggleButton)

			{

				create the new copy of the keystate

				memcpy (newKeyState, oldKeyState, 1);
Active control key.

				newKeyState [VK_CONTROL] = 128;

				SetKeyboardState (newKeyState);
generate left mouse button events that will be holding the CTRL active

				SetActiveCtrl (panelHandle, PANEL_GRAPH);

				GetPanelAttribute (panelHandle, ATTR_SYSTEM_WINDOW_HANDLE, (intptr_t *) &hwnd);)

				isFakeDouble = 1;

				SendMessage (hwnd, WM_LBUTTONDOWN, 0, 0);

				isFakeDouble = 0;

			}
break;

		case EVENT_LEFT_DOUBLE_CLICK:
mouse event generated will be taken as a double click. restore the old state of the keyboard

			If (isFakeDouble)

				SetKeyboardState (oldKeyState);
break;

	}

	return 0;

}

Tags: NI Software

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