GetCVIWindowHandle
intptr_t GetCVIWindowHandle (void);
Purpose
Returns the window handle associated with the main thread of your LabWindows/CVI application.
You can use this number as the hwnd parameter to the Windows SDK function PostMessage. For this action to work, call RegisterWinMsgCallback and GetCVIWindowHandle and then pass their return values (uMsg and hwnd) to the DLL. When the DLL wants to send a message, it calls PostMessage with these values. When LabWindows/CVI receives the message, it calls the callback function. For more information about PostMessage, refer to www.msdn.com.
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Note LabWindows/CVI can receive the message only when it is processing events. LabWindows/CVI processes events when it is waiting for user input. If the program running in LabWindows/CVI does not call RunUserInterface, GetUserEvent, or scanf, or if it does not return from a User Interface Library callback, events are not processed. To avoid this problem in the program, call the User Interface Library function ProcessSystemEvents periodically. |
(Linux) This function is not supported.
Parameters
None.
Return Value
| Name | Type | Description |
| windowHandle | intptr_t | The window handle associated with the main thread of your LabWindows/CVI application. You can use this number as the hwnd parameter to the Windows PostMessage function. For more information about PostMessage, refer to www.msdn.com. |
Additional Information
Library: User Interface Library
Include file: userint.h
LabWindows/CVI compatibility: LabWindows/CVI 3.0 and later