创建 window 不起作用但没有给出错误消息
Creating a window doesn't work but gives no error messages
我正在尝试创建一个 window,none 出现,但除了我在测试 hWnd 中放置的错误消息外,我没有在任何地方收到错误消息。
#define WIN32_LEAN_AND_MEAN
#include <Windows.h>
#include "entity.h"
LRESULT CALLBACK WndProc (HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch(message)
{
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, message,wParam,lParam);
}
return 0;
}
int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
WNDCLASSEX wcex;
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc= (WNDPROC)WndProc;
wcex.cbClsExtra= 0;
wcex.cbWndExtra= 0;
wcex.hInstance= hInstance;
wcex.hIcon= 0;
wcex.hCursor= LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground= (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName= 0;
wcex.lpszClassName= "Extt";
wcex.hIconSm= 0;
if(!RegisterClassEx(&wcex))
{
MessageBox(NULL, "FAILED TO REGISTER WINDOW CLASS", "ERROR", MB_ICONEXCLAMATION | MB_OK);
return 0;
}
HWND hWnd = CreateWindow("WinD", "Chair", WS_OVERLAPPEDWINDOW, 480, 480, 480, 480, NULL, NULL, hInstance, NULL);
if (hWnd == NULL)
{
MessageBox(NULL, "FAILED TO CREATE WINDOW", "ERROR", MB_ICONEXCLAMATION | MB_OK);
return 0;
}
ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);
MSG msg;
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return (int)msg.wParam;
}
我只是不知道该怎么办了。
我按照那个人说的做了所有事情,我已经阅读并重新阅读了该页面好几遍,但不明白为什么这行不通。
您的类名参数不匹配。如果您使用了 GetLastError()
,它会返回 1407,即:
ERROR_CANNOT_FIND_WND_CLASS
1407 (0x57F)
Cannot find window class.
将wcex.lpszClassName = "Extt";
更改为wcex.lpszClassName = "WinD";
或将第一个参数CreateWindow
更改为"Extt"
。
我正在尝试创建一个 window,none 出现,但除了我在测试 hWnd 中放置的错误消息外,我没有在任何地方收到错误消息。
#define WIN32_LEAN_AND_MEAN
#include <Windows.h>
#include "entity.h"
LRESULT CALLBACK WndProc (HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch(message)
{
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, message,wParam,lParam);
}
return 0;
}
int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
WNDCLASSEX wcex;
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc= (WNDPROC)WndProc;
wcex.cbClsExtra= 0;
wcex.cbWndExtra= 0;
wcex.hInstance= hInstance;
wcex.hIcon= 0;
wcex.hCursor= LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground= (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName= 0;
wcex.lpszClassName= "Extt";
wcex.hIconSm= 0;
if(!RegisterClassEx(&wcex))
{
MessageBox(NULL, "FAILED TO REGISTER WINDOW CLASS", "ERROR", MB_ICONEXCLAMATION | MB_OK);
return 0;
}
HWND hWnd = CreateWindow("WinD", "Chair", WS_OVERLAPPEDWINDOW, 480, 480, 480, 480, NULL, NULL, hInstance, NULL);
if (hWnd == NULL)
{
MessageBox(NULL, "FAILED TO CREATE WINDOW", "ERROR", MB_ICONEXCLAMATION | MB_OK);
return 0;
}
ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);
MSG msg;
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return (int)msg.wParam;
}
我只是不知道该怎么办了。
我按照那个人说的做了所有事情,我已经阅读并重新阅读了该页面好几遍,但不明白为什么这行不通。
您的类名参数不匹配。如果您使用了 GetLastError()
,它会返回 1407,即:
ERROR_CANNOT_FIND_WND_CLASS
1407 (0x57F)
Cannot find window class.
将wcex.lpszClassName = "Extt";
更改为wcex.lpszClassName = "WinD";
或将第一个参数CreateWindow
更改为"Extt"
。