[英]Uninitialized Local Variable in Switch Statement - Win32 API
Alright here is my code I will just provide one function sense the rest of it would not be any helpful. 好了,这是我的代码,我将只提供一个函数,其余的代码将无济于事。 I have been searching for the problem and can not seem to figure it out.
我一直在寻找问题,似乎无法解决。
Error: uninitialized local variable 'hTextBox' used Win32Project2
错误:使用了Win32Project2的未初始化的局部变量'hTextBox'
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam)
{
HDC hdc;
RECT rect;
PAINTSTRUCT ps;
HWND hTextBox;
switch (message)
{
case WM_CREATE:
hTextBox = CreateWindow(L"edit", L"", WS_CHILD|WS_VISIBLE|WS_BORDER, 5, 5, 200, 25, hwnd, NULL, NULL, NULL);
CreateWindow(L"button", L"Click me!", WS_CHILD | WS_VISIBLE, 20, 40, 75, 25, hwnd, (HMENU)1, NULL, NULL);
break;
case WM_COMMAND:
switch (LOWORD(wparam))
{
case 1:
int returnedCharacters = 0;
returnedCharacters = GetWindowText(hTextBox, &szTextSaved[0], 20);
break;
}
case WM_PAINT:
hdc = BeginPaint(hwnd, &ps);
GetClientRect(hwnd, &rect);
DrawText(hdc, L"This is a text message!", -1, &rect, DT_CENTER | DT_VCENTER);
EndPaint(hwnd, &ps);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
}
return DefWindowProc(hwnd, message, wparam, lparam);
}
它不是静态的,因此它不会记住WM_CREATE中发生的情况
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.