我正在尝试创建一个没有可见窗口的应用程序,只是一个托盘图标。我试图在这里拼凑各种教程和答案,但是还没有比这更进一步。右键单击时出现上下文菜单,但完全空白。我也不确定一旦我开始工作,我会如何检测我点击的内容。
最终目标是通过单击上下文菜单中的两个选项之一来切换DNS服务器。
#include <Windows.h>
#include <shellapi.h>
#include <tchar.h>
#include <WinUser.h>
HINSTANCE gInstance = NULL;
LRESULT CALLBACK pWndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
WNDCLASSEX wx;
HWND hWnd;
ZeroMemory(&wx, sizeof(WNDCLASSEX));
wx.cbSize = sizeof(WNDCLASSEX);
wx.lpfnWndProc = pWndProc;
wx.hInstance = hInstance;
wx.lpszClassName = (LPCWSTR)"DNSChanger";
RegisterClassEx(&wx);
CreateWindowEx(0, (LPCWSTR)"DNSChanger", (LPCWSTR)"", 0, 0, 0, 0, 0, HWND_MESSAGE, NULL, NULL, NULL);
gInstance = hInstance;
MSG stMsg;
while (GetMessage(&stMsg, NULL, 0, 0) > 0)
{
TranslateMessage(&stMsg);
DispatchMessage(&stMsg);
}
return 0;
}
LRESULT CALLBACK pWndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
NOTIFYICONDATA niData;
ZeroMemory(&niData, sizeof(NOTIFYICONDATA));
switch (uMsg)
{
case WM_CREATE:
{
niData.cbSize = sizeof(NOTIFYICONDATA);
niData.uID = 1;
niData.uFlags = NIF_ICON | NIF_MESSAGE | NIF_TIP;
niData.hIcon = LoadIcon(gInstance, MAKEINTRESOURCE(IDI_SHIELD));
niData.hWnd = hWnd;
niData.uCallbackMessage = WM_USER + 1;
Shell_NotifyIcon(NIM_ADD, &niData);
}
return 0;
case WM_DESTROY:
{
niData.hWnd = hWnd;
Shell_NotifyIcon(NIM_DELETE, &niData);
}
return 0;
case WM_USER + 1:
{
switch (LOWORD(lParam))
{
case WM_RBUTTONUP:
{
POINT lpClickPoint;
HMENU hPopMenu;
UINT uFlag = MF_BYPOSITION | MF_UNCHECKED | MF_STRING;
GetCursorPos(&lpClickPoint);
hPopMenu = CreatePopupMenu();
InsertMenu(hPopMenu, 0xFFFFFFFF, MF_BYPOSITION | MF_STRING, WM_USER + 1, _T("Exit"));
SetForegroundWindow(hWnd);
TrackPopupMenu(hPopMenu, TPM_LEFTALIGN | TPM_LEFTBUTTON | TPM_BOTTOMALIGN, lpClickPoint.x, lpClickPoint.y, 0, hWnd, NULL);
}
}
}
}
}
答案 0 :(得分:0)
不要使用像(LPCWSTR)"DNSChanger"
这样的演员表。这只隐藏了编译器错误。你的程序工作的唯一原因是因为这个错误在两个不同的地方重复,它会被取消。
你打算写L"DNSChanger"
。
窗口过程必须返回DefWindowProc(hWnd, uMsg, wParam, lParam);
在WM_DESTROY
中,如果要关闭应用程序,则必须包含PostQuitMessage(0);
。
定义要在菜单中使用的新常量
const int IDM_EXIT = 100;
...
InsertMenu(hmenu, 0, MF_BYPOSITION | MF_STRING, IDM_EXIT, L"Exit");
该菜单将发送IDM_EXIT命令作为部分WM_COMMAND
消息。以下是一些建议的更改:
HINSTANCE gInstance = NULL;
const int IDM_EXIT = 100;
LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
static NOTIFYICONDATA niData = { sizeof(NOTIFYICONDATA) };
switch(uMsg)
{
case WM_CREATE:
{
niData.uID = 1;
niData.uFlags = NIF_ICON | NIF_MESSAGE | NIF_TIP;
niData.hIcon = LoadIcon(gInstance, IDI_SHIELD);
niData.hWnd = hWnd;
niData.uCallbackMessage = WM_USER + 1;
Shell_NotifyIcon(NIM_ADD, &niData);
return 0;
}
case WM_DESTROY:
{
niData.hWnd = hWnd;
Shell_NotifyIcon(NIM_DELETE, &niData);
PostQuitMessage(0);
return 0;
}
case WM_COMMAND:
{
if(LOWORD(wParam) == IDM_EXIT)
PostQuitMessage(0);
break;
}
case WM_USER + 1:
{
WORD cmd = LOWORD(lParam);
if (cmd == WM_RBUTTONUP || cmd == WM_LBUTTONUP)
{
POINT pt;
GetCursorPos(&pt);
HMENU hmenu = CreatePopupMenu();
InsertMenu(hmenu, 0, MF_BYPOSITION | MF_STRING, IDM_EXIT, L"Exit");
TrackPopupMenu(hmenu, TPM_LEFTALIGN | TPM_LEFTBUTTON | TPM_BOTTOMALIGN, pt.x, pt.y, 0, hWnd, NULL);
}
break;
}
}
return DefWindowProc(hWnd, uMsg, wParam, lParam);
}
int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE, LPSTR, int)
{
gInstance = hInstance;
WNDCLASSEX wx = { sizeof(WNDCLASSEX) };
wx.lpfnWndProc = WndProc;
wx.hInstance = hInstance;
wx.lpszClassName = L"DNSChanger";
RegisterClassEx(&wx);
CreateWindowEx(0, L"DNSChanger", L"", 0, 0, 0, 0, 0, HWND_MESSAGE, NULL, NULL, NULL);
MSG msg;
while(GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return 0;
}