vc下关于CreateWindowEx的问题

Posted 2023-02-26

BOOL CWnd::CreateEx(
DWORD dwExStyle, // extended window style
LPCTSTR lpClassName, // pointer to registered class name
LPCTSTR lpWindowName, // pointer to window name
DWORD dwStyle, // window style
int x, // horizontal position of window
int y, // vertical position of window
int nWidth, // window width
int nHeight, // window height
HWND hWndParent, // handle to parent or owner window
HMENU hMenu, // handle to menu or child-window identifier
HANDLE hInstance, // handle to application instance
LPVOID lpParam // pointer to window-creation data
)

m_hWnd = ::CreateWindowEx(dwExStyle,lpClassName,lpWindowName,dwStyle,x,y,nWidth,nHeight,hWndParent,hMenu,hInstance,lpParam);
if(m_hWnd != NULL)
return TRUE;
else
return FALSE;
提示错误为：error C2664: 'CreateWindowExA' : cannot convert parameter 11 from 'void *' to 'struct HINSTANCE__ *'为什么啊？
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m_hWnd = ::CreateWindowEx(dwExStyle,lpClassName,lpWindowName,dwStyle,x,y,nWidth,nHeight,hWndParent,hMenu,hInstance,lpParam);

改为

m_hWnd = ::CreateWindowEx(
    dwExStyle,
    lpClassName,
    lpWindowName,
    dwStyle,
    x,y,nWidth,nHeight,
    hWndParent,
    hMenu,
    (HINSTANCE)hInstance,
    lpParam); 参考技术A 你的函数参数不对，不应该用“HANDLE”，而应该用HINSTANCE
BOOL CWnd::CreateEx(
DWORD dwExStyle, // extended window style
LPCTSTR lpClassName, // pointer to registered class name
LPCTSTR lpWindowName, // pointer to window name
DWORD dwStyle, // window style
int x, // horizontal position of window
int y, // vertical position of window
int nWidth, // window width
int nHeight, // window height
HWND hWndParent, // handle to parent or owner window
HMENU hMenu, // handle to menu or child-window identifier
HANDLE hInstance, // handle to application instance ×××这个地方不对
LPVOID lpParam // pointer to window-creation data
) 参考技术B m_hWnd 是如何定义的？

改成HWND hWnd = ::CreateWindowEx(dwExStyle,lpClassName,lpWindowName,dwStyle,x,y,nWidth,nHeight,hWndParent,hMenu,hInstance,lpParam); 参考技术C hInstance 是什么类型?
你把代码多发点 参考技术D m_hWnd
=
::CreateWindowEx(dwExStyle,lpClassName,lpWindowName,dwStyle,x,y,nWidth,nHeight,hWndParent,hMenu,hInstance,lpParam);
改为
m_hWnd
=
::CreateWindowEx(
dwExStyle,
lpClassName,
lpWindowName,
dwStyle,
x,y,nWidth,nHeight,
hWndParent,
hMenu,
(HINSTANCE)hInstance,
lpParam);