Win32 EditControl多行文本框自动换行，并在添加新行时自动将光标移到末尾

#include <stdio.h> #include <tchar.h> #include <time.h> #include <Windows.h> #include <CommCtrl.h> #include <WindowsX.h> #include "resource.h" #pragma comment(lib, "comctl32.lib") #pragma comment(linker, "\"/manifestdependency:type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='*' language='*' publicKeyToken='6595b64144ccf1df'\"") void add_new_line(HWND hedit, HWND hstatic) { char str[100]; char *p, *q; int i, len, size; time_t t; struct tm tm; // 根据当前时间生成新行内容 time(&t); localtime_s(&tm, &t); strftime(str, sizeof(str), "当前时间: %Y-%m-%d %H:%M:%S", &tm); len = GetWindowTextLengthA(hedit) + 2 + strlen(str); // 新文本长度 = 原有文本长度 + 换行符长度 + 新行长度 size = len + 1; // 新文本长度 + 字符串结束符长度 p = (char *)malloc(size); if (p != NULL) { // 新添加一行 GetWindowTextA(hedit, p, size); // 获取原有文本 if (p[0] != '\0') strcat_s(p, size, "\r\n"); // 添加换行符 strcat_s(p, size, str); // 添加新行 SetWindowTextA(hedit, p); // 设置新文本 // 计算总行数 i = 1; for (q = strstr(p, "\r\n"); q != NULL; q = strstr(q + 2, "\r\n")) i++; _snprintf_s(str, sizeof(str), sizeof(str) - 1, "行数: %d", i); SetWindowTextA(hstatic, str); free(p); // 光标移动到末尾 SetFocus(hedit); Edit_Scroll(hedit, i, 0); Edit_SetSel(hedit, len, len); } } LRESULT CALLBACK DlgProc(HWND hDlg, UINT uMsg, WPARAM wParam, LPARAM lParam) { int wmId; HWND hedit, hstatic; switch (uMsg) { case WM_COMMAND: wmId = LOWORD(wParam); switch (wmId) { case IDOK: hedit = GetDlgItem(hDlg, IDC_EDIT1); hstatic = GetDlgItem(hDlg, IDC_STATIC2); add_new_line(hedit, hstatic); break; case IDCANCEL: EndDialog(hDlg, 0); break; } case WM_INITDIALOG: break; } return 0; } int WINAPI _tWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow) { int ret; InitCommonControls(); ret = DialogBox(hInstance, MAKEINTRESOURCE(IDD_DIALOG1), NULL, DlgProc); return ret; }