获得鼠标指针热点的颜色
作者:互联网
#include <windows.h> #define ID_TIMER 1 void FindWindowSize(int*, int*); LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM); int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow) { static TCHAR szAppName[] = TEXT("WhatClr"); HWND hwnd; int cxWindow, cyWindow; MSG msg; WNDCLASS wndclass; wndclass.style = CS_HREDRAW | CS_VREDRAW; wndclass.lpfnWndProc = WndProc; wndclass.cbClsExtra = 0; wndclass.cbWndExtra = 0; wndclass.hInstance = hInstance; wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION); wndclass.hCursor = LoadCursor(NULL, IDC_ARROW); wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH); wndclass.lpszMenuName = NULL; wndclass.lpszClassName = szAppName; if(!RegisterClass(&wndclass)) { MessageBox(NULL, TEXT("This program requires Windows NT !"), szAppName, MB_ICONERROR); return 0; } FindWindowSize(&cxWindow, &cyWindow); hwnd = CreateWindow(szAppName, TEXT("What Color"), WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_BORDER, CW_USEDEFAULT, CW_USEDEFAULT, cxWindow, cyWindow, NULL, NULL, hInstance, NULL); ShowWindow(hwnd, iCmdShow); UpdateWindow(hwnd); while(GetMessage(&msg, NULL, 0, 0)) { TranslateMessage(&msg); DispatchMessage(&msg); } return msg.wParam; } void FindWindowSize(int* pcxWindow, int* pcyWindow) { HDC hdcScreen; TEXTMETRIC tm; hdcScreen = CreateIC(TEXT("DISPLAY"), NULL, NULL, NULL); GetTextMetrics(hdcScreen, &tm); DeleteDC(hdcScreen); *pcxWindow = 2*GetSystemMetrics(SM_CXBORDER)+12*tm.tmAveCharWidth; *pcyWindow = 2*GetSystemMetrics(SM_CYBORDER)+GetSystemMetrics(SM_CYCAPTION)+2*tm.tmHeight; } LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) { static COLORREF cr, crLast; static HDC hdcScreen; HDC hdc; PAINTSTRUCT ps; POINT pt; RECT rc; TCHAR szBuffer[16]; switch(message) { case WM_CREATE: hdcScreen = CreateDC(TEXT("DISPLAY"), NULL, NULL, NULL); SetTimer(hwnd, ID_TIMER, 100, NULL); return 0; case WM_TIMER: GetCursorPos(&pt); cr = GetPixel(hdcScreen, pt.x, pt.y); SetPixel(hdcScreen, pt.x, pt.y, 0); if(cr!=crLast) { crLast = cr; InvalidateRect(hwnd, NULL, FALSE); } return 0; case WM_PAINT: hdc = BeginPaint(hwnd, &ps); GetClientRect(hwnd, &rc); wsprintf(szBuffer, TEXT(" %02X %02X %02X "), GetRValue(cr), GetGValue(cr), GetBValue(cr)); DrawText(hdc, szBuffer, -1, &rc, DT_SINGLELINE|DT_CENTER|DT_VCENTER); EndPaint(hwnd, &ps); return 0; case WM_DESTROY: DeleteDC(hdcScreen); KillTimer(hwnd, ID_TIMER); PostQuitMessage(0); return 0; } return DefWindowProc(hwnd, message, wParam, lParam); }
标签:return,鼠标,hwnd,hdcScreen,wndclass,cr,NULL,热点,指针 来源: https://www.cnblogs.com/lhb666aboluo/p/13873334.html