如何用vb做一个透明的textbox框?哪位高手指点一下啦！

来源：百度知道 编辑：UC知道 时间：2024/05/25 21:05:02
只将文本框本身透明，不要连窗体都透过了。
就是说不要将洞打透。

新建工程,1个text1.. 思路就是让text1的BackColor设置为一个不常见的颜色.比如例子中的blue, 然后让blue变成透明..这样就只有text1透明了..

Private Declare Function GetWindowLong Lib "user32" Alias "GetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long) As Long
Private Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
Private Declare Function SetLayeredWindowAttributes Lib "user32" (ByVal hwnd As Long, ByVal crKey As Long, ByVal bAlpha As Byte, ByVal dwFlags As Long) As Long
Private Const WS_EX_LAYERED = &H80000
Private Const GWL_EXSTYLE = (-20)
Private Const LWA_ALPHA = &H2
Private Const LWA_COLORKEY = &H1

Private Sub Form_Load()
Text1.BackColor = vbBlue
Dim rtn As Long
rtn = GetWindowLong(hwnd, GWL_EXSTYLE)
rtn = rtn Or WS_EX_LAYERED
SetWindowLong hwnd, GWL_EXSTYLE, rtn
SetLayeredW