如何在 VB .NET 中设置多行文本框提示标签？
How to set multiline textbox hint label in VB .NET?
此代码适用于文本框，但不适用于多行文本框，我该如何为我的多行文本框更改此代码？
<DllImport("user32.dll", CharSet:=CharSet.Auto)> _
Private Shared Function SendMessage(ByVal hWnd As IntPtr, ByVal msg As Integer, ByVal wParam As Integer, <MarshalAs(UnmanagedType.LPWStr)> ByVal lParam As String) As Int32
End Function
SendMessage(Me.textbox1.Handle, &H1501, 0, "Enter User name here")
此代码来自此 How to set TextBox hint label in VB .NET?
你不能这样做。见
您不能在多行编辑控件或丰富的编辑控件上设置提示横幅。
https://docs.microsoft.com/en-us/windows/win32/controls/em-setcuebanner
此代码适用于文本框，但不适用于多行文本框，我该如何为我的多行文本框更改此代码？
<DllImport("user32.dll", CharSet:=CharSet.Auto)> _
Private Shared Function SendMessage(ByVal hWnd As IntPtr, ByVal msg As Integer, ByVal wParam As Integer, <MarshalAs(UnmanagedType.LPWStr)> ByVal lParam As String) As Int32
End Function
SendMessage(Me.textbox1.Handle, &H1501, 0, "Enter User name here")
此代码来自此 How to set TextBox hint label in VB .NET?
你不能这样做。见
您不能在多行编辑控件或丰富的编辑控件上设置提示横幅。
https://docs.microsoft.com/en-us/windows/win32/controls/em-setcuebanner