Public Declare Function SendDlgItemMessage Lib 'user32' _ (ByVal hDlg As Long, ByVal nIDDlgItem As Long) As Long Public Declare Function GetDlgItem Lib 'user32' _ I have a form with 2 labels and a button, on button click the app required loads and closes fine.Ĭhanging label1 to window title does not work, button click event doesn't work, copying textbox text to label2 doesn't work. also want it to close the app if error occurs and display message box to advise of the error. Ive tried this code and works perfectly for notepad but i am trying to open app ' ' press the button then copy the textbox text and then close the application Now I just need to do the part to handle the Serial data from the Microprocessor rather than getting the data from a text box, but I have done that part before.

Private Sub Form2_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load New_Data = (DateAndTime.DateString & ', ' & _ 'Adds 'Date, Time, Text from Textbox1' to end of FilePath. Public Shared Sub AppendAllText(ByVal path As String, ByVal contents As String) Never mind, I found something else to do my project. Particularly the time and date the data was recieved and what data was recieved. I would like to log some information when I recieve data from a microprocessor on the serial port.

How can I get it to add to the new text to the end of the file. The problem is when I change the text in the text box and click button1 it replaces the existing text. This looks like a good start for a project I want to do. NumText = SendMessage(ChildHandle, WM_GETTEXT, 200, Hndl) 'Find the Edit control of the Running Notepadĭim ChildHandle As IntPtr = FindWindowEx(Hwnd, IntPtr.Zero, 'Edit', Nothing)ĭim Hndl As IntPtr = Marshal.AllocHGlobal(200) 'copy the characters from the unmanaged memory to a managed stringĭim Text As String = Marshal.PtrToStringUni(Handle) 'send WM_GWTTEXT message to the notepad windowĭim NumText As Integer = SendMessage(Hwnd, WM_GETTEXT, 50, Handle) 'Alloc memory for the buffer that recieves the textĭim Handle As IntPtr = Marshal.AllocHGlobal(100) Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Clickĭim Hwnd As IntPtr = FindWindow(Nothing, 'Untitled - Notepad') Private Shared Function FindWindowEx(ByVal parentHandle As IntPtr, _ĭeclare Auto Function FindWindow Lib 'user32.dll' (ByVal lpClassName As String, ByVal lpWindowName As String) As IntPtr Private Const WM_GETTEXT As Integer = &HDĭeclare Auto Function SendMessage Lib 'user32.dll' (ByVal hWnd As IntPtr, ByVal msg As Integer, _īyVal wParam As IntPtr, ByVal lParam As IntPtr) As IntPtr In the Form1 class copy paste the code below Imports Open NotePad.exe and type some text there,do not close the notepad Now create a windows application ,Drag a Button and two labels on to the form.

Ecid grabber windows