Win32 API 打開新 window
[英]Win32 API open new window
問題描述
我正在學習 Win32 API。 在我的主要/第一個 window 中，我想要一個打開的 window 2 按鈕，然后打開一個新的 Window。 所以這個想法是，當按下按鈕時，調用 function 來打開 window 2。但我不知道如何在這里調用這個 function：
LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_COMMAND:
{
switch(wParam) {
case OPEN_WINDOW2_BUTTON:
{} // <------------------------- what do I put here?
}
}
case WM_CREATE:{
AddControls1(hwnd);
break;
}
case WM_DESTROY:
PostQuitMessage (0);
break;
default:
return DefWindowProc (hwnd, message, wParam, lParam);
}
return 0;
}
這是我的整個代碼：
#if defined(UNICODE) && !defined(_UNICODE)
#define _UNICODE
#elif defined(_UNICODE) && !defined(UNICODE)
#define UNICODE
#endif
#include <tchar.h>
#include <iostream>
#include <tchar.h>
#include <windows.h>
#define OPEN_WINDOW2_BUTTON 1
using namespace std;
LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM);
LRESULT CALLBACK windowprocessforwindow2(HWND handleforwindow2,UINT message,WPARAM wParam,LPARAM lParam);
void AddControls1(HWND);
void createwindow2 (WNDCLASSEX wincl_2, HWND& hwnd, HINSTANCE hThisInstance, int nCmdShow);
HWND hMainWindow, hwnd, hHeader;
TCHAR szClassName[ ] = _T("CodeBlocksWindowsApp");
int WINAPI WinMain(HINSTANCE hThisInstance,
HINSTANCE hPrevInstance,
LPSTR lpszArgument,
int nCmdShow)
{
bool endprogram=false;
//create window 1
MSG messages; /* Here messages to the application are saved */
WNDCLASSEX wincl_1; /* Data structure for the windowclass */
/* The Window structure */
wincl_1.hInstance = hThisInstance;
wincl_1.lpszClassName = szClassName;
wincl_1.lpfnWndProc = WindowProcedure; /* This function is called by windows */
wincl_1.style = CS_DBLCLKS; /* Catch double-clicks */
wincl_1.cbSize = sizeof (WNDCLASSEX);
/* Use default icon and mouse-pointer */
wincl_1.hIcon = LoadIcon (NULL, IDI_APPLICATION);
wincl_1.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
wincl_1.hCursor = LoadCursor (NULL, IDC_ARROW);
wincl_1.lpszMenuName = NULL; /* No menu */
wincl_1.cbClsExtra = 0; /* No extra bytes after the window class */
wincl_1.cbWndExtra = 0; /* structure or the window instance */
/* Use Windows's default colour as the background of the window */
wincl_1.hbrBackground = (HBRUSH) COLOR_BACKGROUND;
//----
if (!RegisterClassEx (&wincl_1))
return 0;
/* The class is registered, let's create the program*/
hwnd = CreateWindowEx (
0, /* Extended possibilites for variation */
szClassName, /* Classname */
_T("Code::Blocks Template Windows App"), /* Title Text */
WS_OVERLAPPEDWINDOW, /* default window */
CW_USEDEFAULT, /* Windows decides the position */
CW_USEDEFAULT, /* where the window ends up on the screen */
1800, /* The programs width */
920, /* and height in pixels */
HWND_DESKTOP, /* The window is a child-window to desktop */
NULL, /* No menu */
hThisInstance, /* Program Instance handler */
NULL /* No Window Creation data */
);
/* Make the window visible on the screen */
ShowWindow(hwnd,nCmdShow);
/* Run the message loop. It will run until GetMessage() returns 0 */
while (GetMessage (&messages, NULL, 0, 0))
{
/* Translate virtual-key messages into character messages */
TranslateMessage(&messages);
/* Send message to WindowProcedure */
DispatchMessage(&messages);
}
/* The program return-value is 0 - The value that PostQuitMessage() gave */
return messages.wParam;
}
void createwindow2 (WNDCLASSEX wincl_2, HWND& hwnd, HINSTANCE hThisInstance, int nCmdShow)
{
if (!RegisterClassEx (&wincl_2))
wincl_2.hInstance = hThisInstance;
wincl_2.lpszClassName = szClassName;
wincl_2.lpfnWndProc = (WNDPROC)windowprocessforwindow2; /* This function is called by windows */
wincl_2.style = CS_DBLCLKS; /* Catch double-clicks */
wincl_2.cbSize = sizeof (WNDCLASSEX);
/* Use default icon and mouse-pointer */
wincl_2.hIcon = LoadIcon (NULL, IDI_APPLICATION);
wincl_2.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
wincl_2.hCursor = LoadCursor (NULL, IDC_ARROW);
wincl_2.lpszMenuName = NULL; /* No menu */
wincl_2.cbClsExtra = 0; /* No extra bytes after the window class */
wincl_2.cbWndExtra = 0; /* structure or the window instance */
/* Use Windows's default colour as the background of the window */
wincl_2.hbrBackground = (HBRUSH) COLOR_BACKGROUND;
HWND handleforwindow2 = CreateWindowEx (
0, /* Extended possibilites for variation */
szClassName, /* Classname */
_T("Code::Blocks Template Windows App"), /* Title Text */
WS_OVERLAPPEDWINDOW, /* default window */
CW_USEDEFAULT, /* Windows decides the position */
CW_USEDEFAULT, /* where the window ends up on the screen */
330, /* The programs width */
320, /* and height in pixels */
HWND_DESKTOP, /* The window is a child-window to desktop */
NULL, /* No menu */
hThisInstance, /* Program Instance handler */
NULL /* No Window Creation data */
);
/* Make the window visible on the screen */
ShowWindow(handleforwindow2,nCmdShow);
}
LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
case WM_COMMAND:
{
switch(wParam) {
case OPEN_WINDOW2_BUTTON:
{} // <------------------------- what do I put here?
}
}
case WM_CREATE:{
AddControls1(hwnd);
break;
}
case WM_DESTROY:
PostQuitMessage (0);
break;
default:
return DefWindowProc (hwnd, message, wParam, lParam);
}
return 0;
}
LRESULT CALLBACK windowprocessforwindow2(HWND handleforwindow2,UINT msg,WPARAM wParam,LPARAM lParam)
{
switch(msg)
{
case WM_COMMAND:
{
switch(wParam) {
}
}
case WM_CREATE:{
AddControls1(hwnd);
break;
}
case WM_DESTROY:
PostQuitMessage (0);
break;
default:
return DefWindowProc(handleforwindow2,msg,wParam,lParam);
}
return 0;
}
void AddControls1(HWND hwnd)
{
CreateWindowW(L"Button",L" Open Window 2", WS_VISIBLE | WS_CHILD, 215,285,300,30,hwnd, (HMENU)OPEN_WINDOW2_BUTTON,NULL,NULL);
}
任何幫助將不勝感激。 謝謝！
1 個解決方案
解決方案1
0 已采納 2020-07-27 02:42:30
首先，可以通過GetWindowLong function獲取應用程序的實例句柄。
然后創建一個WNDCLASSEX結構並將其傳遞到您的createwindow2 function。
最后在OPEN_WINDOW2_BUTTON消息中調用（原createwindow2 function中的hwnd參數不需要了）。
修改后的代碼如下：
#if defined(UNICODE) && !defined(_UNICODE)
#define _UNICODE
#elif defined(_UNICODE) && !defined(UNICODE)
#define UNICODE
#endif
#include <tchar.h>
#include <iostream>
#include <tchar.h>
#include <windows.h>
#define OPEN_WINDOW2_BUTTON 1
using namespace std;
LRESULT CALLBACK WindowProcedure(HWND, UINT, WPARAM, LPARAM);
LRESULT CALLBACK windowprocessforwindow2(HWND handleforwindow2, UINT message, WPARAM wParam, LPARAM lParam);
void AddControls1(HWND);
void createwindow2(WNDCLASSEX& wincl_2, HINSTANCE& hThisInstance, int nCmdShow);
void AddControls2(HWND hwnd);
HWND hMainWindow, hwnd, hHeader;
TCHAR szClassName[] = _T("CodeBlocksWindowsApp");
TCHAR szClassName2[] = _T("CodeBlocksWindowsApp2");
int WINAPI WinMain(HINSTANCE hThisInstance,
HINSTANCE hPrevInstance,
LPSTR lpszArgument,
int nCmdShow)
{
bool endprogram = false;
//create window 1
MSG messages; /* Here messages to the application are saved */
WNDCLASSEX wincl_1; /* Data structure for the windowclass */
/* The Window structure */
wincl_1.hInstance = hThisInstance;
wincl_1.lpszClassName = szClassName;
wincl_1.lpfnWndProc = WindowProcedure; /* This function is called by windows */
wincl_1.style = CS_DBLCLKS; /* Catch double-clicks */
wincl_1.cbSize = sizeof(WNDCLASSEX);
/* Use default icon and mouse-pointer */
wincl_1.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wincl_1.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
wincl_1.hCursor = LoadCursor(NULL, IDC_ARROW);
wincl_1.lpszMenuName = NULL; /* No menu */
wincl_1.cbClsExtra = 0; /* No extra bytes after the window class */
wincl_1.cbWndExtra = 0; /* structure or the window instance */
/* Use Windows's default colour as the background of the window */
wincl_1.hbrBackground = (HBRUSH)COLOR_BACKGROUND;
//----
if (!RegisterClassEx(&wincl_1))
return 0;
/* The class is registered, let's create the program*/
hwnd = CreateWindowEx(
0, /* Extended possibilites for variation */
szClassName, /* Classname */
_T("Code::Blocks Template Windows App"), /* Title Text */
WS_OVERLAPPEDWINDOW, /* default window */
CW_USEDEFAULT, /* Windows decides the position */
CW_USEDEFAULT, /* where the window ends up on the screen */
1800, /* The programs width */
920, /* and height in pixels */
HWND_DESKTOP, /* The window is a child-window to desktop */
NULL, /* No menu */
hThisInstance, /* Program Instance handler */
NULL /* No Window Creation data */
);
/* Make the window visible on the screen */
ShowWindow(hwnd, nCmdShow);
/* Run the message loop. It will run until GetMessage() returns 0 */
while (GetMessage(&messages, NULL, 0, 0))
{
/* Translate virtual-key messages into character messages */
TranslateMessage(&messages);
/* Send message to WindowProcedure */
DispatchMessage(&messages);
}
/* The program return-value is 0 - The value that PostQuitMessage() gave */
return messages.wParam;
}
void createwindow2(WNDCLASSEX &wincl_2,HINSTANCE &hThisInstance, int nCmdShow)
{
wincl_2.hInstance = hThisInstance;
wincl_2.lpszClassName = szClassName2;
wincl_2.lpfnWndProc = (WNDPROC)windowprocessforwindow2; /* This function is called by windows */
wincl_2.style = CS_DBLCLKS; /* Catch double-clicks */
wincl_2.cbSize = sizeof(WNDCLASSEX);
/* Use default icon and mouse-pointer */
wincl_2.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wincl_2.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
wincl_2.hCursor = LoadCursor(NULL, IDC_ARROW);
wincl_2.lpszMenuName = NULL; /* No menu */
wincl_2.cbClsExtra = 0; /* No extra bytes after the window class */
wincl_2.cbWndExtra = 0; /* structure or the window instance */
/* Use Windows's default colour as the background of the window */
wincl_2.hbrBackground = (HBRUSH)COLOR_BACKGROUND;
if (!RegisterClassEx(&wincl_2))
return;
HWND handleforwindow2 = CreateWindowEx(
0, /* Extended possibilites for variation */
szClassName2, /* Classname */
_T("Code::Blocks Template Windows App"), /* Title Text */
WS_OVERLAPPEDWINDOW, /* default window */
CW_USEDEFAULT, /* Windows decides the position */
CW_USEDEFAULT, /* where the window ends up on the screen */
330, /* The programs width */
320, /* and height in pixels */
HWND_DESKTOP, /* The window is a child-window to desktop */
NULL, /* No menu */
hThisInstance, /* Program Instance handler */
NULL /* No Window Creation data */
);
/* Make the window visible on the screen */
ShowWindow(handleforwindow2, nCmdShow);
}
LRESULT CALLBACK WindowProcedure(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
static HINSTANCE hInstance;
case WM_COMMAND:
{
switch (wParam) {
case OPEN_WINDOW2_BUTTON:
{
WNDCLASSEX w2;
hInstance = (HINSTANCE)::GetWindowLong(hwnd, GWL_HINSTANCE);
createwindow2(w2, hInstance,SW_SHOW);
} // <------------------------- what do I put here?
}
}
case WM_CREATE: {
AddControls1(hwnd);
break;
}
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hwnd, message, wParam, lParam);
}
return 0;
}
LRESULT CALLBACK windowprocessforwindow2(HWND handleforwindow2, UINT msg, WPARAM wParam, LPARAM lParam)
{
switch (msg)
{
case WM_COMMAND:
{
switch (wParam) {
}
}
return 0;
case WM_CREATE: {
AddControls2(handleforwindow2);
break;
}
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(handleforwindow2, msg, wParam, lParam);
}
return 0;
}
void AddControls1(HWND hwnd)
{
CreateWindowW(L"Button", L" Open Window 2", WS_VISIBLE | WS_CHILD, 215, 285, 300, 30, hwnd, (HMENU)OPEN_WINDOW2_BUTTON, NULL, NULL);
}
void AddControls2(HWND hwnd)
{
CreateWindowW(L"Button", L" A NEW WINDOW", WS_VISIBLE | WS_CHILD, 215, 285, 300, 30, hwnd, (HMENU)2, NULL, NULL);
}
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