Question

vb用sendmessage发送中文

已知要发的地方的句柄 问第二个参数是用WM_char 还是WM_settext还是别的什么？还有后面那俩参数怎么写?不要用复制哦，我要是找的到也不会来问。。不胜感激~
wangtk1982的答案为什么会有“dll调用约定错误”？

Answer 1

你要发送的目标是一个文本框么？是的话就用SETTEXT，wParam填0，lParam填你那个中文串的变量。
如果目标不是文本框，可能就要找其他的消息了。
另外，这类操作有的可以不用SendMessage的，比如SetWindowText API封装了一种发送SETTEXT message的情况。

Answer 2

使用WM_SETTEXT 消息 WM_char 是单个字符

Public Const WM_SETTEXT = 12
Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any)

窗体中
Dim i As Long
Dim s As String
s = "你要输入的文字"
i = SendMessage(hwnd, WM_SETTEXT, 0, ByVal s)

另 楼上两位说直接使用SetWindowText 这个函数如果是本地进程可以使用
如过是其他进程则只能使用SendMessage

这个是MSDN原话
If the target window is owned by the current process, SetWindowText causes a WM_SETTEXT message to be sent to the specified window or control. If the control is a list box control created with the WS_CAPTION style, however, SetWindowText sets the text for the control, not for the list box entries.

To set the text of a control in another process, send the WM_SETTEXT message directly instead of calling SetWindowText.

==============================================
Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
我把声明写错了 拉了点东西 呵呵

Answer 3

顶楼上，建议用SetWindowText API函数