如何将文本追加到一个TextBox？

我觉得以下code应该是不言自明的。

I think the following code should be self-explanatory.

#include <Windows.h>

static HWND textBoxInput;
static HWND button;
static HWND textBoxOutput;

LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);

int CALLBACK WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR cmdLine,int nCmdShow)
{
    HWND hMainWindow;
    WNDCLASS wc = {};
    wc.lpfnWndProc = WindowProc;
    wc.lpszClassName = "Main's window class";
    wc.hInstance = hInstance;
    RegisterClass(&wc);


    hMainWindow = CreateWindow(wc.lpszClassName,"Append text main window",WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,CW_USEDEFAULT,500,400,NULL,NULL,hInstance,NULL);

    error=GetLastError();

    if(hMainWindow == NULL) return 1;

    textBoxInput = CreateWindowEx(WS_EX_CLIENTEDGE, "Edit", NULL,WS_CHILD | WS_VISIBLE | ES_AUTOHSCROLL, 10, 10, 300, 21, hMainWindow, NULL, NULL, NULL);

    button = CreateWindowEx(WS_EX_CLIENTEDGE,"Button","Append",WS_CHILD | WS_VISIBLE | ES_CENTER, 10, 41,75,30,hMainWindow,NULL,NULL,NULL); 

    textBoxOutput = CreateWindowEx(WS_EX_CLIENTEDGE,"Edit",TEXT("->This content is untouchable and unreadable!<-"),WS_CHILD | WS_VISIBLE | WS_VSCROLL | ES_AUTOVSCROLL |  ES_MULTILINE | ES_READONLY ,10,81,500,90,hMainWindow,NULL,NULL,NULL);


    ShowWindow(hMainWindow,SW_SHOW);

    MSG msg = { };

    while (GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    return 0;
}

LRESULT CALLBACK WindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    switch(uMsg)
    {
        case WM_COMMAND:
        if((HWND)lParam == button)
        {               
            TCHAR* buffer = new TCHAR[150];

            GetWindowText(textBoxInput,buffer,150);

            SetWindowText(textBoxOutput,buffer);
            //AppendWindowText(textBoxOutput,buffer,150) - I haven't found such function;           
                    delete [] buffer;       
        }
        break;

        case WM_PAINT:          
            {
            PAINTSTRUCT ps;
            HDC hdc = BeginPaint(hwnd, &ps);
            HBRUSH pedzel;

            pedzel = CreateSolidBrush(RGB(10,250,10));

            FillRect(hdc, &ps.rcPaint, pedzel);

            EndPaint(hwnd, &ps);
            return 0;
            }
        case WM_DESTROY:
            PostQuitMessage(0);
            return 0;
    }
    return DefWindowProc(hwnd, uMsg, wParam, lParam);
}

在简介：此程序创建两个文本框和启动复制从第一到第二内容的处理的按钮。在 SetWindowText函数功能使清洗输出框，什么明显是不希望的。

In brief: this program creates two textBoxes and a button that launches a process of copying a content from the first to the second. The SetWindowText function causes cleaning the output box , what obviously isn't desired.

的杰里Cofinn的答案后更新

SendMessage(textBoxOutput,EM_SETSEL,-1,-1); //no difference between passing 0 or -1
SendMessage(textBoxOutput,EM_REPLACESEL,TRUE,(LPARAM)buffer);

出人意料的是，它的 prepends 的文字。我读过文档有关EM_SETSEL，我仍然不知道为什么没有把原始输入结尾。

Surprisingly, it prepends the text. I've read the documentation about EM_SETSEL and I'm still wondering why doesn't it place the raw input at the end.