问题描述
从一个源文件发送队列中的消息并在另一个源文件中获取消息。我阅读了微软的文档并尝试实现如下
test2.c - 发布消息 main.c - 获取消息
Testing1：如果我在单个文件中执行相同的代码并收到数据
测试：相同的代码写在两个单独的文件“如果（msg.message == WM_YOUR_MESSAGE）”这些语句不满足。
test2.h
typedef struct
{
int SomeData1;
int SomeData2;
int SomeDatan;
} MessageData;
/* Unique IDs for Window messages to exchange between the worker and the
GUI thread. */
#define WM_YOUR_MESSAGE ( WM_USER + 3 )
void __cdecl ThreadProc(void* aArg);
test2.c
#include <windows.h>
#include <process.h>
#include "malloc.h"
#include <stdio.h>
#include <test2.h>
volatile DWORD ThreadID_GUI;
void __cdecl ThreadProc(void* aArg)
{
MessageData* data;
for (;; )
{
Sleep(500);
/* Allocate memory for a new message data structure */
data = (MessageData*)malloc(sizeof(*data));
/* Initialize the message data structure with some information to transfer
to the GUI thread. */
data->SomeData1 = 1234;
data->SomeData2 = 4567;
data->SomeDatan = 7894;
PostThreadMessage(ThreadID_GUI,WM_YOUR_MESSAGE,(LParaM)data);
}
}
main.c
#include <windows.h>
#include <tchar.h>
#include <process.h>
#include "malloc.h"
#include "stdio.h"
#include<test2.h>
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.
ThreadID_GUI = GetCurrentThreadId();
/* Start some background thread */
_beginthread(ThreadProc,0);
// Initialize global strings
LoadStringW(hInstance,IDS_APP_TITLE,szTitle,MAX_LOADSTRING);
LoadStringW(hInstance,IDC_TESTMESSAGEQUEUE,szWindowClass,MAX_LOADSTRING);
MyRegisterClass(hInstance);
// Perform application initialization:
if (!InitInstance (hInstance,nCmdshow))
{
return FALSE;
}
HACCEL hAccelTable = LoadAccelerators(hInstance,MAKEINTRESOURCE(IDC_TESTMESSAGEQUEUE));
MSG msg;
// Main message loop:
while (GetMessage(&msg,NULL,0))
{
/* STEP 3: React on the message sent from the foreign thread */
if (msg.message == WM_YOUR_MESSAGE)
{
MessageData* tmp = (MessageData*)msg.lParam;
if (tmp->SomeData1 == 1234) {
printf("someData\n");
}
/* Free the data structure associated to the message */
free(tmp);
}
TranslateMessage(&msg);
dispatchMessage(&msg);
}
return (int) msg.wParam;
}
ATOM MyRegisterClass(HINSTANCE hInstance)
{
WNDCLASSEXW wcex;
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc = WndProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = hInstance;
wcex.hIcon = LoadIcon(hInstance,MAKEINTRESOURCE(IDI_CLIENTMQ));
wcex.hCursor = LoadCursor(nullptr,IDC_ARROW);
wcex.hbrBackground = (HBrush)(COLOR_WINDOW+1);
wcex.lpszMenuName = MAKEINTRESOURCEW(IDC_CLIENTMQ);
wcex.lpszClassName = szWindowClass;
wcex.hIconSm = LoadIcon(wcex.hInstance,MAKEINTRESOURCE(IDI_SMALL));
return RegisterClassExW(&wcex);
}
BOOL InitInstance(HINSTANCE hInstance,int nCmdshow)
{
hInst = hInstance; // Store instance handle in our global variable
HWND hWnd = CreateWindowW(szWindowClass,WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,nullptr,hInstance,nullptr);
if (!hWnd)
{
return FALSE;
}
ShowWindow(hWnd,nCmdshow);
UpdateWindow(hWnd);
return TRUE;
}
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);
}
}
break;
case WM_PAINT:
{
PAINTSTRUCT ps;
HDC hdc = BeginPaint(hWnd,&ps);
// Todo: Add any drawing code that uses hdc here...
EndPaint(hWnd,&ps);
}
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd,lParam);
}
return 0;
}
// Message handler for about Box.
INT_PTR CALLBACK About(HWND hDlg,LParaM
lParam)
{
UNREFERENCED_ParaMETER(lParam);
switch (message)
{
case WM_INITDIALOG:
return (INT_PTR)TRUE;
case WM_COMMAND:
if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)
{
EndDialog(hDlg,LOWORD(wParam));
return (INT_PTR)TRUE;
}
break;
}
return (INT_PTR)FALSE;
}
解决方法
在您填写源代码中所有缺失的信息并删除无用代码后，您的代码就可以正常工作了。
main.c:
C:\Users\yourUsername\PycharmProjects\yourProjectName\venv\Scripts\activate.battest2.c：
#include <stdio.h>
#include <stdlib.h>
#include <windows.h>
#include <process.h>
#include "test2.h"
HINSTANCE hInst;
LPCWSTR szWindowClass = L"Piu";
LPCWSTR szTitle = L"Title";
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);
}
}
break;
case WM_PAINT:
{
PAINTSTRUCT ps;
HDC hdc = BeginPaint(hWnd,&ps);
// TODO: Add any drawing code that uses hdc here...
EndPaint(hWnd,&ps);
}
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd,lParam);
}
return 0;
}
ATOM MyRegisterClass(HINSTANCE hInstance)
{
WNDCLASSEXW wcex;
ZeroMemory(&wcex,sizeof(wcex));
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc = WndProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = hInstance;
/*
wcex.hIcon = LoadIcon(hInstance,MAKEINTRESOURCE(IDI_CLIENTMQ));
wcex.hIconSm = LoadIcon(wcex.hInstance,MAKEINTRESOURCE(IDI_SMALL));
wcex.hCursor = LoadCursor(nullptr,IDC_ARROW);
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
wcex.lpszMenuName = MAKEINTRESOURCEW(IDC_CLIENTMQ);
*/
wcex.lpszClassName = szWindowClass;
return RegisterClassExW(&wcex);
}
BOOL InitInstance(HINSTANCE hInstance,int nCmdShow)
{
hInst = hInstance; // Store instance handle in our global variable
HWND hWnd = CreateWindowW(szWindowClass,szTitle,WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,hInstance,NULL);
if (!hWnd)
{
return FALSE;
}
ShowWindow(hWnd,nCmdShow);
UpdateWindow(hWnd);
return TRUE;
}
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.
ThreadID_GUI = GetCurrentThreadId();
/* Start some background thread */
_beginthread(ThreadProc,0);
// Initialize global strings
// LoadStringW(hInstance,IDS_APP_TITLE,MAX_LOADSTRING);
// LoadStringW(hInstance,IDC_TESTMESSAGEQUEUE,szWindowClass,MAX_LOADSTRING);
MyRegisterClass(hInstance);
// Perform application initialization:
if (!InitInstance(hInstance,nCmdShow))
{
return FALSE;
}
// HACCEL hAccelTable = LoadAccelerators(hInstance,MAKEINTRESOURCE(IDC_TESTMESSAGEQUEUE));
MSG msg;
// Main message loop:
while (GetMessage(&msg,NULL,0))
{
/* STEP 3: React on the message sent from the foreign thread */
if (msg.message == WM_YOUR_MESSAGE)
{
MessageData* tmp = (MessageData*)msg.lParam;
if (tmp->SomeData1 == 1234) {
printf("someData\n");
}
/* Free the data structure associated to the message */
free(tmp);
}
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return (int)msg.wParam;
}
test2.h
#include <Windows.h>
#include "test2.h"
volatile DWORD ThreadID_GUI;
void __cdecl ThreadProc(void* aArg)
{
MessageData* data;
for (;; )
{
Sleep(500);
/* Allocate memory for a new message data structure */
data = (MessageData*)malloc(sizeof(*data));
/* Initialize the message data structure with some information to transfer
to the GUI thread. */
data->SomeData1 = 1234;
data->SomeData2 = 4567;
data->SomeDataN = 7894;
PostThreadMessage(ThreadID_GUI,WM_YOUR_MESSAGE,(LPARAM)data);
}
}
我删除了菜单和图标，所以没有 .rc 文件。