问题
I'm trying to add some application controls into my Windows API code (Note: I am using Visual Studio) I am experiencing a problem where I try to add in a CreateWindowW() function that generates text and a field ("static" and "edit") and a menu at the same time. The menu works fine on its own ("Calculations"):
However, adding the CreateWindow() function "erases" the menu entirely but yields the CreateWindowW() outputs (also flickers a bit):
The code I have right now is this (the menu function and the CreateWindowW() functions are at the bottom):
#define MAX_LOADSTRING 100
#define FILE_MENU_DESTROY 1
#define FILE_MENU_ABOUT 2
// Global Variables:
HINSTANCE hInst; // current instance
WCHAR szTitle[MAX_LOADSTRING]; // The title bar text
WCHAR szWindowClass[MAX_LOADSTRING]; // the main window class name
// Forward declarations of functions included in this code module:
ATOM MyRegisterClass(HINSTANCE hInstance);
BOOL InitInstance(HINSTANCE, int);
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
//INT_PTR CALLBACK About(HWND, UINT, WPARAM, LPARAM);
//Custom Application Function Forwrd Declarations
void WinControls(HWND);
void WinMenu(HWND);
HMENU hMenu;
int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
_In_opt_ HINSTANCE hPrevInstance,
_In_ LPWSTR lpCmdLine,
_In_ int nCmdShow)
{
UNREFERENCED_PARAMETER(hPrevInstance);
UNREFERENCED_PARAMETER(lpCmdLine);
// TODO: Place code here.
// Initialize global strings
LoadStringW(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
LoadStringW(hInstance, IDC_RANKTOOLADVANCED, szWindowClass, MAX_LOADSTRING);
MyRegisterClass(hInstance); //Generates an instance of a window class
// Perform application initialization:
if (!InitInstance (hInstance, nCmdShow))
{
return FALSE;
}
HACCEL hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_RANKTOOLADVANCED));
MSG msg;
// Main message loop:
while (GetMessage(&msg, nullptr, 0, 0))
{
if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
return (int) msg.wParam;
}
//
// FUNCTION: MyRegisterClass()
//
// PURPOSE: Registers the window class.
//
ATOM MyRegisterClass(HINSTANCE hInstance)//Class properties of the window
{
WNDCLASSEXW wcex;
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc = WndProc; //assigns a window to the instance of the class
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = hInstance; //creates an instance
wcex.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_RANKTOOLADVANCED));
wcex.hCursor = LoadCursor(nullptr, IDC_ARROW); //defines a type of cursor (arrow, help, cross, etc.)
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName = MAKEINTRESOURCEW(IDC_RANKTOOLADVANCED);
wcex.lpszClassName = szWindowClass;
wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));
return RegisterClassExW(&wcex);
}
//
// FUNCTION: InitInstance(HINSTANCE, int)
//
// PURPOSE: Saves instance handle and creates main window
//
// COMMENTS:
//
// In this function, we save the instance handle in a global variable and
// create and display the main program window.
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{//initializes instance of window class (invocation)
hInst = hInstance; // Store instance handle in our global variable
HWND hWnd = CreateWindowW(szWindowClass, L"test", WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, 0, 900, 600, nullptr, nullptr, hInstance, nullptr);
if (!hWnd)
{
return FALSE;
}
ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);
return TRUE;
}
//
// FUNCTION: WndProc(HWND, UINT, WPARAM, LPARAM)
//
// PURPOSE: Processes messages for the main window.
//
// WM_COMMAND - process the application menu
// WM_PAINT - Paint the main window
// WM_DESTROY - post a quit message and return
//
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_COMMAND:
{
int wmId = LOWORD(wParam);
// Parse the menu selections:
switch (wmId)
{/*
case IDM_ABOUT:
DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
break;
case IDM_EXIT:
DestroyWindow(hWnd);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
case FILE_MENU_NEW:
{
MessageBox(hWnd, L"task failed successfully", L"you done goofed", MB_OK | MB_ICONEXCLAMATION);
break;
}*/
case FILE_MENU_DESTROY:
{
DestroyWindow(hWnd);
break;
}
case FILE_MENU_ABOUT:
{
MessageBox(hWnd, L"about", L"About", MB_OK);
break;
}
break;
}
}
case WM_CREATE:
{
WinControls(hWnd);
WinMenu(hWnd);
break;
}/*
case WM_PAINT:
{
PAINTSTRUCT ps;
HDC hdc = BeginPaint(hWnd, &ps);
// TODO: Add any drawing code that uses hdc here...
TextOut(hdc, 10, 10, rekt, _tcslen(rekt));
TextOut(hdc, 10, 40, reverse, _tcslen(reverse));
EndPaint(hWnd, &ps);
break;
}*/
case WM_DESTROY:
{
PostQuitMessage(0);
break;
}
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}
void WinMenu(HWND hWnd) {
hMenu = CreateMenu();
HMENU hFileMenu = CreateMenu();
HMENU hSubMenu = CreateMenu();
HMENU hSubMenu2 = CreateMenu();
//XP Calculations
AppendMenuW(hSubMenu, MF_STRING, NULL, L"Rank -> XP");
AppendMenuW(hSubMenu, MF_STRING, NULL, L"XP -> Rank");
//Credit Calculations
AppendMenuW(hSubMenu2, MF_STRING, NULL, L"Rank -> Cred");
AppendMenuW(hSubMenu2, MF_STRING, NULL, L"Cred -> Rank");
AppendMenuW(hFileMenu, MF_POPUP, (UINT_PTR)hSubMenu, L"Points"); //option that popups submenu of hSubMenu
AppendMenuW(hFileMenu, MF_POPUP, (UINT_PTR)hSubMenu2, L"Credits"); //option that popups submenu of hSubMenu
AppendMenuW(hFileMenu, MF_SEPARATOR, NULL, NULL); // separator
AppendMenuW(hFileMenu, MF_STRING, FILE_MENU_ABOUT, L"About");
AppendMenuW(hFileMenu, MF_STRING, FILE_MENU_DESTROY, L"Exit"); // option
AppendMenuW(hMenu, MF_POPUP, (UINT_PTR)hFileMenu, L"Calculations"); //popups up submenu of hFileMenu
SetMenu(hWnd, hMenu);
}
void WinControls(HWND hWnd) {
CreateWindowW(L"Static", L"Enter text here: ", WS_VISIBLE | WS_CHILD | WS_BORDER | SS_CENTER, 400, 100, 100, 50, hWnd, NULL, NULL, NULL);
CreateWindowW(L"Edit", L"...", WS_VISIBLE | WS_CHILD, 400, 155, 100, 50, hWnd, NULL, NULL, NULL);
}
Please do note that the setup is the Visual Studio basic setup for the program. Any help is appreciated!
回答1:
I have done some debugging and figured out it was that the CreateWindowW() I used for the static and edit controls was conflicting with the definition of the window properties.
Since the window was defined by WNDCLASSEXW wcex, I just had to change the CreateWindowW() with CreateWindowExW().
Only new problem is that the static control (and the others) works but not the edit control, which kills the menu.
来源：https://stackoverflow.com/questions/60909835/win32-api-createwindoww-conflicts-with-menu-creation