>>55
#include <windows.h>
#include <stdio.h>
#pragma comment (lib, "user32.lib")
#pragma comment (lib, "gdi32.lib")
int main(int argc, char **argv) {
　if (argc != 3) {printf("%s InputFile OutputFile\n", *argv); return EXIT_FAILURE;}
　HBITMAP hBmp = (HBITMAP)LoadImage(NULL, argv[1], IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE | LR_MONOCHROME);
　if (!hBmp) {printf("ファイルがロードできない\n"); return EXIT_FAILURE;}
　BITMAP bm;
　GetObject(hBmp, sizeof bm, &bm);
　int size = bm.bmHeight * ((bm.bmWidthBytes + 3) & ~3);
　void *bits = malloc(size);
　if (!bits) {printf("メモリ無さ杉\n"); return EXIT_FAILURE;}
　struct {BITMAPINFOHEADER b; RGBQUAD c[2];} bi =
　　{{sizeof bi.b, bm.bmWidth, bm.bmHeight, 1, 1},{{255, 255, 255}}};
　HDC hDC = GetDC(NULL);
　GetDIBits(hDC, hBmp, 0, bm.bmHeight, bits, (BITMAPINFO *)&bi, DIB_RGB_COLORS);
　ReleaseDC(NULL, hDC);
　DeleteObject(hBmp);
　FILE *fp = fopen(argv[2], "wb");
　if (!fp) {printf("ファイルがオープンできない: %s\n", argv[2]); return EXIT_FAILURE;}
　BITMAPFILEHEADER bf = {'MB', sizeof bf + sizeof bi + size, 0, 0, sizeof bf + sizeof bi};
　fwrite(&bf, sizeof bf, 1, fp);
　fwrite(&bi, sizeof bi, 1, fp);
　fwrite(bits, size, 1, fp);
　fclose(fp);
　free(bits);
　return EXIT_SUCCESS;
}