试了一下，对win API还是不熟悉啊，代码如下，不多说了，还是得多练练项目
#include <windows.h>
#include <stdlib.h>
#include <malloc.h>
#include <memory.h>
#include <tchar.h>
#define MAX_LOADSTRING 100
// 全局变量:
HINSTANCE hInst; // 当前实例
WCHAR szTitle[MAX_LOADSTRING]; // 标题栏文本
WCHAR szWindowClass[MAX_LOADSTRING]; // 主窗口类名
RECT rect;
HDC g_srcMemDc;
int screenW;
int screenH;
BOOL isSelect = FALSE;
BOOL isDown = FALSE;
// 此代码模块中包含的函数的前向声明:
ATOM MyRegisterClass(HINSTANCE hInstance);
BOOL InitInstance(HINSTANCE, int);
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
INT_PTR CALLBACK About(HWND, UINT, WPARAM, LPARAM);
void ScreenCapture();
void CopyBitmapToCipBoard();
int APIENTRY wWinMain(_In_ HINSTANCE hInstance,
_In_opt_ HINSTANCE hPrevInstance,
_In_ LPWSTR lpCmdLine,
_In_ int nCmdShow)
{
UNREFERENCED_PARAMETER(hPrevInstance);
UNREFERENCED_PARAMETER(lpCmdLine);
// TODO: 在此放置代码。
// 初始化全局字符串
LoadStringW(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
LoadStringW(hInstance, IDC_SCREENCAPTURE, szWindowClass, MAX_LOADSTRING);
MyRegisterClass(hInstance);
// 执行应用程序初始化:
if (!InitInstance(hInstance, nCmdShow))
{
return FALSE;
}
HACCEL hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_SCREENCAPTURE));
MSG msg;
// 主消息循环:
while (GetMessage(&msg, nullptr, 0, 0))
{
if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}
return (int)msg.wParam;
}
//
// 函数: MyRegisterClass()
//
// 目的: 注册窗口类。
//
ATOM MyRegisterClass(HINSTANCE hInstance)
{
WNDCLASSEXW wcex;
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = CS_HREDRAW | CS_VREDRAW | CS_DBLCLKS;
wcex.lpfnWndProc = WndProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = hInstance;
wcex.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_SCREENCAPTURE));
wcex.hCursor = LoadCursor(nullptr, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
wcex.lpszMenuName = 0;//MAKEINTRESOURCEW(IDC_SCREENCAPTURE);
wcex.lpszClassName = szWindowClass;
wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));
return RegisterClassExW(&wcex);
}
//
// 函数: InitInstance(HINSTANCE, int)
//
// 目的: 保存实例句柄并创建主窗口
//
// 注释:
//
// 在此函数中，我们在全局变量中保存实例句柄并
// 创建和显示主程序窗口。
//
BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
hInst = hInstance; // 将实例句柄存储在全局变量中
HWND hWnd = CreateWindowW(szWindowClass, szTitle, WS_POPUP,
CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, nullptr, nullptr, hInstance, nullptr);
if (!hWnd)
{
return FALSE;
}
ShowWindow(hWnd, SW_MAXIMIZE);
UpdateWindow(hWnd);
return TRUE;
}
//
// 函数: WndProc(HWND, UINT, WPARAM, LPARAM)
//
// 目的: 处理主窗口的消息。
//
// WM_COMMAND - 处理应用程序菜单
// WM_PAINT - 绘制主窗口
// WM_DESTROY - 发送退出消息并返回
//
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
//透明画刷
LOGBRUSH brush;
brush.lbStyle = BS_NULL;
HBRUSH hBrush = CreateBrushIndirect(&brush);
//框框颜色
LOGPEN pen;
POINT pt;
pt.x = 2;
pt.y = 2;
pen.lopnColor = 0xFF33FF;
pen.lopnStyle = PS_SOLID;
pen.lopnWidth = pt;
HPEN hPen = CreatePenIndirect(&pen);
switch (message)
{
case WM_LBUTTONDOWN:
//MessageBox(hWnd, L"hh", L"jj", NULL);
{
if (!isSelect)
{
POINT pt;
GetCursorPos(&pt);
rect.left = pt.x;
rect.top = pt.y;
rect.right = pt.x;
rect.bottom = pt.y;
InvalidateRgn(hWnd, 0, true);
isDown = TRUE;
}
}
break;
case WM_LBUTTONUP:
{
if (isDown == TRUE && !isSelect)
{
POINT pt;
GetCursorPos(&pt);
rect.right = pt.x;
rect.bottom = pt.y;
InvalidateRgn(hWnd, 0, true);
isDown = FALSE;
isSelect = TRUE;
}
}
break;
case WM_MOUSEMOVE:
break;
case WM_LBUTTONDBLCLK:
if (isSelect)
{
CopyBitmapToCipBoard();
isSelect = FALSE;
}
break;
case WM_CREATE:
ScreenCapture();
break;
case WM_COMMAND:
{
int wmId = LOWORD(wParam);
// 分析菜单选择:
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);
SelectObject(hdc, hBrush);
SelectObject(hdc, hPen);
BitBlt(hdc, 0, 0, screenW, screenH, g_srcMemDc, 0, 0, SRCCOPY);
Rectangle(hdc, rect.left, rect.top, rect.right, rect.bottom);
EndPaint(hWnd, &ps);
}
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}
// “关于”框的消息处理程序。
INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, 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;
}
void ScreenCapture()
{
HDC disDc = ::CreateDC(L"display", 0, 0, 0);
screenW = GetDeviceCaps(disDc, HORZRES);
screenH = GetDeviceCaps(disDc, VERTRES);
g_srcMemDc = CreateCompatibleDC(disDc);
HBITMAP hbitMap = CreateCompatibleBitmap(disDc, screenW, screenH);
SelectObject(g_srcMemDc, hbitMap);
BitBlt(g_srcMemDc, 0, 0, screenW, screenH, disDc, 0, 0, SRCCOPY);
}
void CopyBitmapToCipBoard()
{
int width = rect.right - rect.left;
int height = rect.bottom - rect.top;
HDC hSrcDc = CreateDC(L"display", 0, 0, 0);
HDC memDC = CreateCompatibleDC(hSrcDc);
HBITMAP hBitmap = CreateCompatibleBitmap(hSrcDc, width, height);
HBITMAP oldmap = (HBITMAP)SelectObject(memDC, hBitmap);
BitBlt(memDC, 0, 0, width, height, hSrcDc, rect.left, rect.top, SRCCOPY);
HBITMAP newmap = (HBITMAP)SelectObject(memDC, oldmap);
if (OpenClipboard(0))
{
EmptyClipboard();
SetClipboardData(CF_BITMAP, newmap);
CloseClipboard();
}
}
实现效果如下
呃。。。好吧
就是直接运行，截图之后画框框，然后双击，然后ctrl+c随便粘喽