这个代码总是工作,我不知道什么是错的,见下图:编辑控件文本不能改变
CreateWindowW(L"EDIT", L"Type Here!", WS_CHILD | WS_VISIBLE | WS_BORDER, 10, 10, 150, 25, hwnd, (HMENU)ID_TEXTBOX1, NULL, NULL);
是运行控制创建程序时,可以选择文本和使用SetWindowText函数进行更改,但不能通过键入更改文本,为什么?
我已经看到堆栈溢出的这个话题:win32 api edit control can't be selected or edited,但即使使用SetFocus函数或EnableWindow,它仍然不起作用。
这是整个程序的功能:
#include <windows.h>
// IDs dos controles
#define ID_TEXTBOX1 1000
#define ID_BUTTON1 1001
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
LPSTR pCmdLine, int nCmdShow)
{
MSG msg;
HWND hwnd;
WNDCLASSW wc;
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.lpszClassName = L"WINDOW";
wc.hInstance = hInstance;
wc.hbrBackground = GetSysColorBrush(COLOR_3DFACE);
wc.lpszMenuName = NULL;
wc.lpfnWndProc = WndProc;
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
RegisterClassW(&wc);
hwnd = CreateWindowW(L"WINDOW", L"Janela",
WS_OVERLAPPEDWINDOW | WS_VISIBLE,
100, 100, 200, 200, NULL, NULL, hInstance, NULL);
ShowWindow(hwnd, nCmdShow);
UpdateWindow(hwnd);
while(GetMessage(&msg, NULL, 0, 0)) {
DispatchMessage(&msg);
}
return (int) msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hwnd, UINT msg,
WPARAM wParam, LPARAM lParam)
{
switch(msg)
{
case WM_CREATE:
// Here is creted the edit control
CreateWindowW(L"EDIT", L"Type Here!", WS_CHILD | WS_VISIBLE | WS_BORDER, 10, 10, 150, 25, hwnd, (HMENU)ID_TEXTBOX1, NULL, NULL);
// Functions that i tried
//EnableWindow(GetDlgItem(hwnd, ID_TEXTBOX1), true);
//SetFocus(GetDlgItem(hwnd, ID_TEXTBOX1));
// Here is create a button
CreateWindowW(L"BUTTON", L"Show Text", WS_CHILD | WS_VISIBLE, 10, 45, 100, 20, hwnd, (HMENU)ID_BUTTON1, NULL, NULL);
break;
case WM_COMMAND:
switch (LOWORD(wParam))
{
case ID_BUTTON1:
int len = GetWindowTextLengthW(GetDlgItem(hwnd, ID_TEXTBOX1)) + 1;
wchar_t *txt = new wchar_t[len];
GetWindowText(GetDlgItem(hwnd, ID_TEXTBOX1), txt, len);
//
MessageBox(NULL, txt, L"Info", MB_OK);
delete txt;
break;
}
break;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
}
return DefWindowProcW(hwnd, msg, wParam, lParam);
}
请发布您的应用程序的消息循环,并提供创建主窗口的代码。你也在泄漏记忆。我可以看到'new wchar_t [len]',但没有附带'delete []'。由于这个问题被标记为* C++ *,您应该使用'std :: vector'而不是手动内存管理。 – IInspectable
@IInspectable我在非托管数组* txt之后添加了整个代码和'delete',但即使在非托管数组之后删除,或者没有WM_COMMAND的内容,它仍然不起作用。 – FelipeDurar
该项目可在http://www.mediafire.com/download/zkfh1u4mi2z4fe4/testEDC.zip – FelipeDurar