How to draw over second monitor with GDIPLUS

Question

I'm want to draw some text and lines over the desktop.
I'm using gdiplus.h for print texts with the function DrawString.
But its only print text on a primary screen monitor.
If has in presentation mode, with 2 monitors I need to print text in a second monitor.
#define _WIN32_WINNT 0x500
#include <windows.h>
#include <gdiplus.h>
using namespace Gdiplus;
#pragma comment (lib,"Gdiplus.lib")
int main() {
HWND desktop = GetDesktopWindow();
HDC hdc = GetWindowDC(desktop);
ULONG_PTR m_gdiplusToken;
// Initialize GDI+
GdiplusStartupInput gdiplusStartupInput;
GdiplusStartup(&m_gdiplusToken, &gdiplusStartupInput, NULL);
while (true)
HPEN newpen;
LPPOINT point = NULL;
newpen = CreatePen(PS_COSMETIC, 20, RGB(255, 0, 0));
SelectObject(hdc, newpen);
MoveToEx(hdc, 1500, 500, point);
LineTo(hdc, 1600, 550 );
//this block works for draw line in second monitor
TextOut(hdc, 1500, 300, TEXT("Text of text out"), 17); // this works too
//But if I'm use gdiplus only print things on the primary screen
Gdiplus::Graphics g(hdc);
Pen pen(Gdiplus::Color(0, 0, 255), 2);
g.DrawLine(&pen, 1500, 0, 1700, 600);// dont work
g.DrawLine(&pen, 0, 0, 1200, 600);// work, but is in the primary screen
FontFamily fontFamily(L"Times New Roman");
Font font(&fontFamily, 24, FontStyleRegular, UnitPixel);
SolidBrush brush(Color(255, 0, 0, 255));
g.DrawString(TEXT("test of GDI+"), 13, &font, PointF(1600.0f, 300.0f), &brush); // dont work
g.DrawString(TEXT("test of GDI+"), 13, &font, PointF(500.0f, 300.0f), &brush); // work, but is in the primary screen
Gdiplus::GdiplusShutdown(m_gdiplusToken);
return 0;

Answer 1

Hi Bhash, Thanks for help.
You can show to me an code example?
I'm tryied with this way: 
#include
#define _WIN32_WINNT 0x500
#include
#include
using namespace Gdiplus;
#pragma comment (lib,"Gdiplus.lib")
HDC hdc;
BOOL CALLBACK MonitorEnumProcCallback(_In_ HMONITOR hMonitor, _In_ HDC DevC, _In_ LPRECT lprcMonitor, _In_ LPARAM dwData) {
MONITORINFOEX info;
info.cbSize = sizeof(MONITORINFO);
BOOL monitorInfo = GetMonitorInfo(hMonitor, &info);
cout << "info szDevice" << info.szDevice << endl;
if (monitorInfo) {
hdc = CreateDC(NULL, info.szDevice, NULL, NULL);
return TRUE;
int main() {
HWND desktop = GetDesktopWindow();
HDC DevC = GetDC(desktop);
BOOL b = EnumDisplayMonitors(DevC, NULL, MonitorEnumProcCallback, 0);
ULONG_PTR m_gdiplusToken;
// Initialize GDI+
GdiplusStartupInput gdiplusStartupInput;
GdiplusStartup(&m_gdiplusToken, &gdiplusStartupInput, NULL);
while (true)
HPEN newpen;
LPPOINT point = NULL;
newpen = CreatePen(PS_COSMETIC, 20, RGB(255, 0, 0));
SelectObject(hdc, newpen);
MoveToEx(hdc, 1500, 500, point);
LineTo(hdc, 1600, 550);
//this block works for draw line in second monitor
TextOut(hdc, 1500, 300, TEXT("Text of text out"), 17); // this works too
//But if I'm use gdiplus only print things on the primary screen
Gdiplus::Graphics g(hdc);
Pen pen(Gdiplus::Color(0, 0, 255), 2);
g.DrawLine(&pen, 1500, 0, 1700, 600);// dont work
g.DrawLine(&pen, 0, 0, 1200, 600);// work, but is in the primary screen
FontFamily fontFamily(L"Times New Roman");
Font font(&fontFamily, 24, FontStyleRegular, UnitPixel);
SolidBrush brush(Color(255, 0, 0, 255));
g.DrawString(TEXT("test of GDI+"), 13, &font, PointF(1600.0f, 300.0f), &brush); // dont work
g.DrawString(TEXT("test of GDI+"), 13, &font, PointF(500.0f, 300.0f), &brush); // work, but is in the primary screen
Gdiplus::GdiplusShutdown(m_gdiplusToken);
return 0;
and I'm tryied too with
BOOL b = EnumDisplayMonitors(NULL, NULL, MonitorEnumProcCallback, 0);
and dosent work for any case, dont print anything in the any monitors
I'm tryied too with this mode: 
#include <iostream>
#define _WIN32_WINNT 0x500
#include <windows.h>
#include <gdiplus.h>
using namespace Gdiplus;
#pragma comment (lib,"Gdiplus.lib")
HDC hdc;
int main() {
DISPLAY_DEVICE dd;
ZeroMemory(&dd, sizeof(dd));
dd.cb = sizeof(dd);
for (int i = 0; EnumDisplayDevices(NULL, i, &dd, 0); i++)
DEVMODE lpDevMode;
hdc = CreateDC(dd.DeviceName, dd.DeviceString, NULL, &lpDevMode);
ULONG_PTR m_gdiplusToken;
// Initialize GDI+
GdiplusStartupInput gdiplusStartupInput;
GdiplusStartup(&m_gdiplusToken, &gdiplusStartupInput, NULL);
std::cout << "hdc: " << hdc << std::endl; //this print 00000000000000000000
while (true)
HPEN newpen;
LPPOINT point = NULL;
newpen = CreatePen(PS_COSMETIC, 20, RGB(255, 0, 0));
SelectObject(hdc, newpen);
MoveToEx(hdc, 200, 500, point);
LineTo(hdc, 300, 550);
//this block dont work
TextOut(hdc, 600, 300, TEXT("Text of text out"), 17); // dont work
//But if I'm use gdiplus only print things on the primary screen
Gdiplus::Graphics g(hdc);
Pen pen(Gdiplus::Color(0, 0, 255), 2);
g.DrawLine(&pen, 1500, 0, 1700, 600);// dont work
g.DrawLine(&pen, 0, 0, 100, 600);// dont work
FontFamily fontFamily(L"Times New Roman");
Font font(&fontFamily, 24, FontStyleRegular, UnitPixel);
SolidBrush brush(Color(255, 0, 0, 255));
g.DrawString(TEXT("test of GDI+"), 13, &font, PointF(1600.0f, 300.0f), &brush); // dont work
g.DrawString(TEXT("test of GDI+"), 13, &font, PointF(500.0f, 300.0f), &brush); // dont work
Gdiplus::GdiplusShutdown(m_gdiplusToken);
return 0;
ando Not was printed, dont print anything in the any monitors.